Publications

209

A set of metal carbonyl cluster-boronic acid conjugates of the group VIII metals (Fe, Ru and Os) was synthesized and their antiproliferative effects measured against two breast cancers (MCF-7 and MDA-MB-231) as well as a non-cancerous breast epithelial (MCF-10A) cell line. The cytotoxicity followed the order Ru > Os > Fe for the MDA-MB-231 cells.

Jia Wen Kong, Zhiyong Lam, Kiat Hwa Chan, Rakesh Ganguly, Jia-Ying Joey Lee, Lit-Hsin Loo, Richard D. Webster, Zhen Xuan Wong and Weng Kee Leong

ACS Omega, accepted.

208

The tetraruthenium tetrahydrido carbonyl cluster Ru4(µ-H)4(CO)12 (1) reacts with diphenylvinylphosphine under thermal activation to give the substitution products Ru4(µ-H)4(CO)12-n(κ1-Ph2PCH=CH2)n, (2) (n = 3 (a); 4 (b)) in which each diphenylvinylphosphine ligand is on a different ruthenium metal center.

Ren Kai Edward Neo, Han Wee Ong, Zhen Xuan Wong, Elumalai Kumaran, Rakesh Ganguly, Weng Kee Leong and Yong Leng Kelvin Tan

J. Cluster Sci. https://doi.org/10.1007/s10876-021-02150-0

207

The diruthenium complex [CpRu(CO)2]2 reacts with diphenyl dichalcogenides via photoinitiation to [CpRu(CO)2]• radicals. The reaction with selenyl sulphide was slower than with disulphide. This has implications for the selective targeting of TrxR.

Wei Xiang Koh, Andrea Paris Gomez, Lee Jiawen, Jasmaadiyah Binte Habib Mohameed and Weng Kee Leong

Results Chem. 2021, 3, 100159.

206

Ferrocenyl and ruthenocenyl derivatives of ebselen are found to be competitive inhibitors of mammalian TrxR, and are selective over GR and excess GSH. They exhibit lower Km values than ebselen and the natural substrate, Trx.

Wei Xiang Koh, Lucia Coppo, Rakesh Ganguly, Arne Holmgren and Weng Kee Leong

J. Organomet. Chem. 2021, 943, 121822.

205

The osmium cluster 1 is the precursor to the metalloligand 2. Its TMNO-activated reaction with PPh3 in CH3CN leads to initial substitution at the Os(CO)3Cl2 “spike” which also shuts down release of the osmostibine. The CH3CN-substituted osmostibine could be generated in situ through the bis-acetonitrile derivative of 1 by converting the “spike” back into its removable Os(CO)3Cl2 form through reaction with CO gas, and then trapping it with W(CO)5(NCCH3).

Ying-Zhou Li, Zhi-Rui Yuan, Rakesh Ganguly, Yongxin Li, Deborah Roshni Rajaratnam and Weng Kee Leong

J. Organomet. Chem. 2021, 942, 121817.

204

The ruthenacyclic carbamoyl complexes [RuBr(2-NHC(O)C5H3N-4-R)(CO)2(MeCN)] in which the 4-position of the pyridinyl ring is derivatized, including by a phosphoryl group, have been synthesized. These bring the ruthenium-based structural mimics a step closer to the natural [Fe]-hydrogenase metal cofactor.

Chandan kr Barik, Rakesh Ganguly, Jian Ming Kwan, Zhiyong Lam, Si Yuan Wong and Weng Kee Leong

Polyhedron 2021, 193, 114890.

203

The solution-state isomers of the heteronuclear cluster RuOs3(µ-H)2(CO)12(PPh3) has been re-examined. The result is a reassignment of the structures and hence the exchange processes observed in the NMR spectra. The results affect the interpretations in at least three of our earlier papers!

Shi Hoe Ng and Weng Kee Leong

Inorg. Chimica Acta 2020, 514, 119989.

202

Ruthenium-based structural mimics of the [Fe]-hydrogenase metal cofactor in which the acyl moiety is replaced by an N-heterocyclic carbene are reported. The pyridyl-NHC ligand has a rather different trans influence from that of a simple NHC.

Chandan kr Barik, Xianqi Chan, Han Vinh Huynh, Yongxin Li, Rakesh Ganguly and Weng Kee Leong

ChemistrySelect 2020, 5, 10775-80.

201

The reaction of the triosmium carbonyl cluster Os3(CO)10(NCCH3)2 with a number of protected amino acids, tri- and pentapeptides show that reaction with the side chains follow the order: -SH > -COOH > -CONH2. There is a slight preference for the longer side chain of glutamic acid over aspartic acid. The trends observed are retained under physiological conditions and in the peptides.

Joey Jia Ying Lee and Weng Kee Leong

J. Organomet. Chem. 2020, 924, 121459.

200

The known cytotoxic and apoptosis-inducing osmium carbonyl cluster Os3(CO)10(NCCH3)2 is a non-substrate inhibitor of mammalian TrxR, with an IC50 of 5.3 ± 0.9 µM. Its inhibition of TrxR is selective over glutathione reductase and excess reduced glutathione. This inhibition has also been demonstrated in cell lysates, suggesting TrxR inhibition as a potential apoptotic pathway.

Wei Xiang Koh, Lucia Coppo, Arne Holmgren, Jia Wen Kong and Weng Kee Leong

Chem. Res. Toxicol., 2020, 33, 2441-5.

199

The higher nuclearity cluster [Os10(µ6-C)(CO)24]2- has been derivatized by reaction with SbX3 or p-tolylSbX2 via insertion of Sb into an Os-Os bond. Further insertion occurs with excess iodine. The chemistry and structure of these clusters can be understood in terms of the isolobal analogy between [Sb(p-tolyl)nX2-n)]+ and I+.

Chandan kr Barik, Rakesh Ganguly, Yongxin Li, Samya Samanta and Weng Kee Leong

J. Cluster. Sci., 2021, 32, 929-35.

198

The complex [Ru2(CO)4(µ-O2CCH2OSi(OEt)3)2(PPh3)2] was used as a single-source precursor to prepare silica-encapsulated ruthenium. The material obtained at different stages of its hydrolysis catalyses different cycloaddition reactions between alkenes and ethyl diazoacetate.

Chandan kr Barik, Rakesh Ganguly, Felipe Garcia and Weng Kee Leong

Inorg. Chim. Acta 2020, 512, 119833.

197

The activated cluster Os3(CO)10(CH3CN)2 reacts readily with a number of carboxylated chalcones and benzaldehydes to afford products with the general formula Os3(CO)10(µ-H)(µ-O2CR). These have been all been characterized and the activity of some against ER+ breast carcinoma (MCF-7) has also been evaluated.

Zheng Hua Kwek, Yingzhou Li, Rakesh Ganguly, A. Mohamed Afreen, Wei Xiang Koh, Weng Kee Leong and Yong Leng Kelvin Tan

J. Cluster Sci. 2020, 31, 759-67.

Publications before 2020

1. P. B. Davies, C. J. Kho, W. K. Leong and W. Lewis-Bevan
The N2F4 == 2NF2 equilibrium studied with a tunable infrared diode laser
J. Chem. Soc., Chem. Commun. 1982, 690-1.

2. H. G. Ang, W. L. Kwik and W. K. Leong
HPLC studies of Os3(CO)12-n(CH3CN)n (n = 0, 1, 2)
J. Organomet. Chem. 1989, 379, 325-30.

3. H. G. Ang, W. L. Kwik, W. K. Leong and J. A. Potenza
Structure of undecacarbonyl[tris(pentafluorophenyl)phosphine]-triangulo-triosmium, a substituted osmium cluster containing a fluorinated triphenylphosphine  ligand.
Acta Crystallogr., Sect. C 1989, C45, 1713-5.

4. H. G. Ang, W. L. Kwik, W. K. Leong, B. F. G. Johnson, J. Lewis and P. R. Raithby
Synthesis and X-ray structural characterisation of the phosphido-bridged triosmium carbonyl cluster [Os3(μ-H)(CO)10{μ-P(C6F5)H}] : Cleavage of a P-C bond of a secondary phosphine.
J. Organomet. Chem. 1990, 396, C43-6.

5. H. G. Ang, W. L. Kwik and W. K. Leong
High Performance Liquid  Chromatography of substituted trinuclear osmium carbonyl clusters  Os3(CO)12-n[P(C6F5)3]n (n = 0, 1, 2)
J. Chromatogr. 1991, 537, 475-81.

6. H. G. Ang, W. L. Kwik and W. K. Leong
Triosmium carbonyl cluster derivatives containing phosphorus ligands
Bull. Sing. N. I. Chem. 1991, 19, 25-42.

7. H. G. Ang, Y. M. Cai, W. L. Kwik, W. K. Leong and D. A. Tocher
Preparation  and X-ray structure of a novel delocalised diphosphazene complex: [Os3(CO)11{(CF3)2P=N=PPh3}]
Polyhedron 1991, 10, 881-2.

8. H. G. Ang, W. L. Kwik, C. H. Koh, W. K. Leong, B. F. G. Johnson, J. Lewis and P. R. Raithby
Preferential attack of the terminal hydrogen in (μ-H)Os3(CO)11H by the (CF3)2NO radical and X-ray structure of {(μ-H)Os3(CO)11}[ON(CF3)2]
J. Organomet. Chem. 1991, 420, 289-92.

9. H. G. Ang, C. H. Koh, L. L. Koh, W. L. Kwik, W. K. Leong and W. Y. Leong
Reactions of perfluoroalkyl-substituted phosphines with osmium carbonyl clusters: Crystal structures of bridged, linked and substituted derivatives
J. Chem. Soc., Dalton Trans. 1993, 847-55.

10. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Higher Nuclearity Clusters Containing Osmium and Tin Atoms. Synthesis and Structure of [(OC)3Os(SnMe2)]3, Os4(SnMe2)4(CO)14, and Os4(μ3-O)(SnMe2)4(CO)14.
Organometallics 1995, 15, 1582-8.

11. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Osmium-Germanium  Clusters. Structures of [(OC)4Os(GeMe2)]2, Os2(GeMe2)2(CO)6, Os3(GeMe2)2(CO)11, [(OC)3Os(GeMe2)]3, and Os4(GeMe2)4(CO)12.
Organometallics 1995, 15, 1589-96.

12. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Synthesis and Structure of [(OC)4Os(PbMe2)]2 and Some Derivatives of the Type Os2(CO)7(SnMe2)2(L)
J. Cluster Sci. 1996, 7, 121-43.

13. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Synthesis and Structure of Os3(μ-H)3(CO)9(μ3-Sn)Os3(μ-H)(CO)10(PEt2Ph) : The First Osmium Cluster Containing a Face-Capping Tin Atom
J. Cluster Sci. 1996, 7, 211-22.

14. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
[Os5(μ-H)2(CO)16]: A  Second Crystal Form.
Acta Crystallogr., Sect. C 1996, C52, 1607-9.

15. W. K. Leong, R. K. Pomeroy, R. J. Batchelor, F. W. B. Einstein and C. F.  Campana
Synthesis and Structure of [Os(OC)4(SnPh2)]6: A Compound  with an Unprecedented 12-membered Ring of Metal Atoms
Organometallics 1997, 16, 1079-82.

16. J. L. Male, F. W. B. Einstein, W. K. Leong, R. K. Pomeroy and D. R. Tyler
Products from the photoreaction of (Me3P)(OC)4OsW(CO)5 with CCl4: Synthesis and isomerization of Os(CO)3(PMe3)Cl2.
J. Organomet. Chem. 1997, 549, 105-15.

17. W. K. Leong
Osmium-Group 14 or 15 Clusters
Bull. Sing. N. I. Chem. 1996, 24, 51-60.

18. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Bisphenylbis[tetracarbonyl(hydrido)osmium]germane, Ph2Ge[Os(CO)4H]2.
Acta Crystallogr., Sect. C 1997, C53, 22-4.

19. W. K. Leong, F. W. B. Einstein and R. K. Pomeroy
Two Chloro-Bridged Osmium Clusters
Acta Crystallogr., Sect. C 1997, C53, 24-7.

20. F. Jiang, J. L. Male, K. Biradha, W. K. Leong, R. K. Pomeroy and M. J. Zaworotko
Complexes Containing Unbridged Dative Metal-Metal Bonds and the Strong Acceptor Ru(CO)3(SiCl3)2 Moiety. Comments on the Transition Metal to Silicon Bond.
Organometallics 1998, 17(26), 5810-9.

21. Y. Liu, W. K. Leong and R. K. Pomeroy
Bromination of Os3(CO)11(EPh3) (E = P, Sb) : Unexpected Formation of a Tandem Donor-Acceptor Metal Chain
Organometallics 1998, 17 (15), 3387-9.

22. G. Chen and W. K. Leong
Nucleophilic Addition Via Metal-Metal Bond Cleavage in an Osmium-Antimony Cluster.
J. Chem. Soc., Dalton Trans. 1998, 2489-92.

23. G. Chen and W. K. Leong
Axial and Equatorial Isomers in an Isonitrile-Substituted Osmium-Antimony Cluster.
J. Organomet. Chem. 1999, 574(2), 276-8.

24. W. K. Leong and Y. Liu
Formation of [Os3(CO)10(EPh3)2(μ-Br)]+ (E = P, As) by Bromination : First Direct Evidence for the Bromonium Mechanism in Cluster Chemistry.
Organometallics 1999, 18(4), 800-2.

25. F. Jiang, K. Biradha, W. K. Leong, R. K. Pomeroy and M. J. Zaworotko
Dicarbonylcyclopentadienyliridium, (η5-C5H5)Ir(CO)2, as a Ligand.
Can. J. Chem. 1999, 77, 1327-35.

26. W. K. Leong and M. W. Lum
(μ-hydrido)(μ-2-hydroxyethoxy)decacarbonyltriosmium, (μ-H)Os3(CO)10(μ-OCH2CH2OH).
Acta Crystallogr., Sect. C 1999, C55, 881-2.

27. W. K. Leong and Y. Liu
Structural Characterisation of the Elusive Isomer of Os3(CO)10(PPh3)2.
J. Organomet. Chem. 1999, 584(1), 174-8.

28. T. P. Loh, K. S. V. Koh, K. Y. Sim and W. K. Leong
Competitive fine-tuning of heteroaromatic imines as dienophiles or dienes in the Lewis acid-mediated Diels-Alder reaction with cyclopentadiene.
Tetrahedron Lett. 1999, 40, 8447-51.

29. K. Biradha, V. M. Hansen, W. K. Leong, R. K. Pomeroy and M. J. Zaworotko           
Steric and Electronic Influences in Os3(CO)11(PR3) Structures
J. Cluster Sci. 2000, 11, 285-305.

30. L. Pereira, W. K. Leong and S. Y. Wong
The Heteronuclear Cluster RuOs3(μ-H)2(CO)13 - a High Yield Synthesis, Isomerism and a Triphenylphosphine Derivative.
J. Organometallic Chem. 2000, 609(1), 104-9.

31. L. Y. Goh, W. K. Leong, P. H. Leung, Z. Weng and I. Haiduc
Chemistry of cyclopentadienyl tricarbonylchromium dimer. Cleavage of bis(thiophosphinyl)disulfanes and bis(thiophosphoryl)disulfanes. Syntheses of CpCr(CO)2(S2PPh2) and CpCr(S2PPh2)2. X-ray crystal structure of CpCr(S2PPh2)2.
J. Organomet. Chem. 2000, 607, 64-71.

32. J. Zhang and W. K. Leong
The Reaction of Diphenyl Ditelluride with Triosmium Clusters.
J. Chem. Soc., Dalton Trans. 2000, 1249-53.

33. Y.-K. Yan, W. Koh, C. Jiang, W. K. Leong and T. S. A. Hor
Amine-oxide-mediated Oxidative Methanolysis of Metal-metal Bonds in [MM'(CO)10] (M = Mn, Re; M' = Re) and [Os3(CO)12]: Crystal Structure of fac-[Re{OC(O)OMe}(CO)3(η2-dppf)].
Polyhedron 2000, 19(6), 641-647.

34. W. K. Leong and G. Chen
The Reaction of [(μ-H)Os3(CO)10(μ-CO)]- with Ph2SbCl : A Cluster with a Six-membered Os4Sb2 Ring and Another with Fluxional Metal-Metal Bonds.
J. Chem. Soc., Dalton Trans. 2000, 4442-4445.

35. W. K. Leong, W. L. J. Leong and J. Zhang
The Reaction of Triphenylphosphine Selenide with Triosmium Clusters : A Facile Cluster Coupling Through a Selenium Atom.
J. Chem. Soc., Dalton Trans. 2001, 1087-1090.

36. C. T. Tay and W. K. Leong
The Thermolysis Products of Os3(CO)11(AsPh3).
J. Organomet. Chem. 2001, 625(2), 231-5.

37. W. K. Leong and G. Chen
Osmium-Antimony Higher Nuclearity Clusters.
Organometallics 2001, 20(11), 2280-7.

38. M. W. Lum and W. K. Leong
Chemical Transformations on Diols Anchored to a Triosmium Cluster.
J. Chem. Soc., Dalton Trans. 2001, 2476-2481.

39. L. Y. Goh, Z. Weng, W. K. Leong, I. Haiduc, K. M. Lo and R. C. S. Wong
Chemistry of cyclopentadienyl tricarbonylchromium dimer. Cleavage of bis(thiophosphoryl)disulfanes. Syntheses and X-ray crystal structures of CpCr(CO)2(S2P(OR)2), CpCr(S2P(OR)2)2 and Cr(S2P(OR)2)3 (R = iPr).
J. Organomet. Chem. 2001, 631, 67-75.

40. L. Y. Goh, Z. Weng, W. K. Leong, P. H. Leung
C-S Bond Cleavages and C-C Coupling in Cyclopentadienylchromium Complexes To Give the First Dithiooxamide-Bridged and Doubly Dithiocarbamate-Bridged Double Cubanes: [Cp6Cr8S8{(C(S)NEt2)2}] and [Cp6Cr8S8(S2CNEt2)2].
Angew. Chem. Intl. Ed. Engl. 2001,  40, 3236-9.

41. W. K. Leong and G. Chen
Metal-Metal Bond Opening Towards Main Group-Transition Element Rings.
Organometallics 2001, 20(26), 5771-3.

42. M. Deng and W. K. Leong
Novel Higher Nuclearity Osmium-Antimony Clusters by Alkene- or Diene-Assisted Cluster Condensation.
J. Chem. Soc., Dalton Trans. 2002, 1020-3.

43. M. Deng and W. K. Leong
Reactions of the Triosmium-Antimony Cluster Os3(μ-SbPh2)(μ-H)(μ3,η2-C6H4)(CO)9 with Alkynes: C-C Bond Coupling to a Cluster-Bound Phenylene and Catalytic Alkyne Cyclotrimerisation.
Organometallics 2002, 21(6), 1221-6.

44. G. Chen, M. Deng, C. K. Lee and W. K. Leong
Nucleophilic Addition Reactions of the Osmium-Antimony Cluster (μ-H)Os3(CO)9(μ3-C6H4)(μ-SbPh2): Orthometallation of Triphenylphosphine at Ambient Temperature.
Organometallics 2002, 21(6), 1227-34.

45. L. Y. Goh, Z. Weng, W. K. Leong and J. J. Vittal
Organometallic Radical-Initiated Cleavage of the Metal Chelate and Thiazole Rings in a Cyclopentadienylchromium Complex.
J. Amer. Chem. Soc. 2002, 124(30), 8804-5.

46. L. Y. Goh, Z. Weng, W. K. Leong and P. H. Leung
Synthetic and Structural Study of Cyclopentadienylchromium Dithiocarbamate Complexes and Their Thermolytic Derivatives.
Organometallics 2002, 21(21), 4398-4407.

47. L. Y. Goh, Z. Weng, A. T. S. Hor and W. K. Leong
Organometallic Radical-Initiated Carbon-Sulfur Bond Cleavage and Carbon-Carbon Coupling in Dithiocarbamate and Thiocarbenoid Cyclopentadienylchromium Complexes
Organometallics 2002, 21(21), 4408-14.

48. L. Y. Goh, Z. Weng, W. K. Leong, J. J. Vittal and I. Haiduc
An Organometallic Radical Route to Bis(phosphido)- and Hydridophosphino-bridged Metal-metal Bonded Complexes of Cyclopentadienylchromium via Desulfurization of Thiophosphinito Ligands.
Organometallics 2002, 21, 5287-91.

49. L. Y. Goh, M. E. Teo, S. B. Khoo, W. K. Leong and J. J. Vittal
Cyclic Thioether and Acyclic Thioether-Thiolate Complexes of Pentamethylcyclopentadienyl Ruthenium (II,III).
J. Organomet. Chem. 2002, 664, 161-169.

50. R. Y. C. Shin, M. A. Bennett, L. Y. Goh, W. Chen, D. C. R. Hockless, W. K. Leong, K. Mashima and A. C. Willis
Arene-Ruthenium Complexes of an Acyclic Thilolate-Thioether and Tridentate Thioether Derivatives Resulting from Ring-Closure Reactions.
Inorg. Chem. 2003, 42(1), 96-106.

51. Z. Weng, W. K. Leong, J. J. Vittal and L. Y. Goh
Phosphinidene- and Phosphido-bridged Complexes from a h5 Arylthioxophosphane Cyclopentadienylchromium Complex.
Organometallics 2003, 22, 1657-62.

52. Z. Weng, W. K. Leong, J. J. Vittal and L. Y. Goh
Complexes from Ring Opening of Lawesson's Reagent and Phosphorus-phosphorus Coupling.
Organometallics 2003, 22, 1645-56.

53. Y. Zhu, K. Carpenter, C. B. Ching, S. Bahnmueller, P. K. Chan, S. S. Venugopal, W. K. Leong and M. F. Hawthorne
(R)-Binap-Mediated Asymmetric Hydrogenation with a Rhodacarborane Catalyst in Ionic-Liquid Media.
Angew. Chem. Intl. Ed. Engl. 2003, 42, 3792-5.

54. Q. Lin and W. K. Leong
The Reaction of Pyrones with Triosmium Clusters.
Organometallics 2003, 22, 3639-48.

55. M. W. Lum and W. K. Leong
Reactions of the Triosmium Cluster Os3(μ-H)(μ-OH)(CO)10 with Naphthols.
J. Organomet. Chem. 2003, 687, 203-8.

56. M. W. Lum and W. K. Leong
Organo-Group 15 Derivatives of Triosmium Clusters Containing Naphthyl Ligands.
Inorg. Chim. Acta. 2004, 357(3), 769-74.

57. Q. Lin, W. K. Leong and L. Gao
The Photochemical and Thermal Reactions of a Triosmium Cluster Carrying a γ-Pyrone Ligand with Alkynes.
J. Organomet. Chem. 2004, 689(1), 25-34. 

58. W. Fan, R. Zhang, W.K. Leong and Y.K. Yan
Reactions of the complexes [Re2(CO)9(η1-P-P)] (P-P = Ph2P(CH2)nPPh2, n = 1-6) with Me3NO: formation of close-bridged complexes [Re2(CO)8(μ-P-P)] and phosphine oxide complexes [Re2(CO)9{P-P(O)}].
Inorg. Chim. Acta. 2004, 357(9), 2441-50.

59. R. Zhang, C. L. Kee, W. K. Leong and Y. K. Yan
Oxalate-bridged Dirhenium(I) Hexacarbonyl Complexes: Synthesis, Reactions and Crystal Structures.
J. Organomet. Chem. 2004, 689, 2837-44. 

60. X. L. Lu, W. K. Leong, L. Y. Goh and A. T. S. Hor
Supramolecular Structures in [Ag(dppf)] Complexes [dppf = 1,1 -Bis(diphenylphosphanyl)ferrocene] Stabilized by Coordinatively Versatile Trifluoroacetate (TFA) Ligands.
Eur. J. Inorg. Chem. 2004, 2504.

61. X. L. Lu, W. K. Leong, A. T. S. Hor and  L. Y. Goh
Coordination Polymers and Supramolecular Structures in Ag(I) triflate-dppf Systems [dppf = 1,1 -Bis(diphenylphosphanyl)ferrocene].
J. Organomet. Chem. 2004, 689, 1746-56.

62. V.W.L. Ng, W.K. Leong, L.L. Koh, G.K. Tan and L.Y. Goh
Synthetic, X-ray structural and protonation studies of CpCr(CO)2SPy and CpCr(CO)2SPym (SPy = C5H4NS, SPym = C4H3N2S).
J. Organomet. Chem. 2004, 689, 3210-7. 

63. Q. Lin and W. K. Leong
The Photochemical Reaction of Os3(CO)10(μ-H)(μ-γ-C5H3O2), a Triosmium Cluster Carrying a g-Pyrone Ligand, with Dimethylacetylenedicarboxylate: Formation of Isomeric Clusters.
J. Organomet. Chem. 2005, 690, 322-7. 

64. L.J. Pereira, K.S. Chan and W.K. Leong
Reaction of the Heterometallic Cluster Os3Ru(μ-H)2(CO)13 with Diphenylphosphine: Phosphido-Bridged Tetrahedral and Butterfly Clusters.
J. Organomet. Chem. 2005, 690, 1033-43.

65. C. Li, M.Y.D. Lai and W.K. Leong
ToF-SIMS Analysis of Surface-Anchored Organometallic Clusters.
J. Organomet. Chem. 2005, 690, 3861-3.

66. S.L. Kuan, W.K. Leong, L.Y. Goh and R.D. Webster
Redox-Dependent Isomerization of Organometallic RuII/RuIII Compounds Containing the Hydrotris(methimazolyl)borate Ligand: An Electrochemical Square Scheme Mechanism.
Organometallics 2005, 24, 4639-48.

67. X. L. Lu, W. K. Leong, L. Y. Goh, A. T. S. Hor and J.J. Vittal
Crystal Structures and Characterizations of (Nitrato-O)(Nitrato-O,O0)(η6-Hexamethylbenzene)Ruthenium(II) and Di(Trifluoroacetato-O)(H2O-O)(η6-Hexamethylbenzene) Ruthenium(II).
Synth. React. Inorg., Metal-Org. Nano-Metal Chem. 2005, 35, 743–746.

68. H. Tan, M.Y. Lai, G.K.S.M. Philip, W.K. Leong, M.W. Wong, W.Y. Fan and L.K. Wong
Preparation and Characterisation of Cr(CO)4dpp
J. Phy. Chem. B 2005, 109, 19657-63.

69. T.S. Chong, P. Li, W.K. Leong and W.Y. Fan
TR-FTIR Absorption Spectroscopy of Transition Metal Carbonyl Radicals Generated by Photodissociation of Meta-Metal Bond, by Halogen Abstraction or by Radical Ligand Substitution
J. Organomet. Chem. 2005, 690, 4132-8. 

70. V.W.L. Ng, Z.Q. Weng, S.L. Kuan, W.K. Leong, J.J. Vittal, L.L. Koh, G.K. Tan and L.Y. Goh
Reactivity of [CpCr(CO)3]2 Towards Thione (C=S) Moieties in Some Sulfur-Containing Substrates
J. Organomet. Chem. 2005, 690, 2323-32. 

71. W. Fan, R. Zhang, W.K. Leong, C.K. Chu and Y.K. Yan
Rhenium Carbonyl Complexes with Monodentate-Coordinated Diphosphines: Activation of Terminal Phosphino Groups Towards Amine-Oxide Oxidation
J. Organomet. Chem. 2005, 690, 3765-73. 

72. V.W.L. Ng, S.L. Kuan, W.K. Leong, L.L. Koh, G.K. Tan and L.Y. Goh
Heterocyclic Thionates as a New Class of Bridging Ligands in Oxo-Centered Triangular Cyclopentadienylchromium(III) Complexes
Inorg. Chem. 2005, 44, 5229-40.

73. R.Y.C. Shin, M.E. Teo, W.K. Leong, J.J. Vittal, J.H.K. Yip, L.Y. Goh and R.W. Webster
S-Alkylation-Induced Redox Reactions Leading to Reversible Sulfur-Sulfur Coupling in a Pentamethylcyclopentadienyl Ruthenium(III) Thiolate-Thioether System
Organometallics 2005, 24, 1483-94.

74. S. Ye and W.K. Leong
Regio- and Stereoselective Addition of Carboxylic Acids to Phenylacetylene Catalysed by Cyclopentadienyl Ruthenium Complexes.
J. Organomet. Chem. 2006, 691, 1117-20. 

75. S. Ye and W.K. Leong
Synthesis and Structure of Some Ruthenium-Rhenium Heterodinuclear Complexes and Their Catalytic Activity in the Addition of Carboxylic Acids to Phenylacetylene.
J. Organomet. Chem. 2006, 691, 1216-22. 

76. S.Y. Ng, G.K. Tan, L.L. Koh, L.Y. Goh, W.K. Leong, S. Ye and Y. Zhu
Heterobimetallic Ruthenium-Cobalt Complexes Containing the Pentamethylcyclopentadienyl or Indenyl Ligand.
Eur. J. Inorg. Chem. 2006, 663-70.

77. G. Chen, M. Deng, C.K.D. Lee, W.K. Leong, J. Tan and C.T. Tay
Triosmium-Antimony Clusters Containing the μ,η2-Phenylene Ligand: Unusually Long Osmium-Osmium Bonds.
J. Organomet. Chem. 2006, 691, 387-94. 

78. K.H. Chan, W.K. Leong, G. Jaouen, L. Leclercq, S. Top, A. Vessières
Organometallic Cluster Analogues of Tamoxifen: Synthesis and Biochemical Assay.
J. Organomet. Chem. 2006, 691, 9-19. 

79. S.L. Kuan, W.K. Leong, L.Y. Goh and R.D. Webster
HMB and Cp* ruthenium(II) complexes containing bis- and tris-(mercaptomethimazolyl)borate ligands: Synthetic, X-ray structural and electrochemical studies (HMB = η6-C6Me6, Cp* = η5-C5Me5).
J. Organomet. Chem. 2006, 691, 907-15. 

80. T.S. Chong, T.S. Chwee, W.K. Leong, M.W. Wong and W.Y. Fan
Methyl Abstraction Kinetics of CpFe(CO)2Me using the benzyl radical clock.
J. Organomet. Chem. 2006, 691, 687-92.

81. G. Chen and W.K. Leong
Two Group 8 Carbonyl Clusters Containing a Naked μ5-Sb Atom.
J. Cluster Sci. 2006, 17(1), 111-8.

82. P. Srinivasan and W.K. Leong
Reaction of the Heteronuclear Cluster Cp*IrRu3(μ-H)2(CO)10 with Alkynes: Stereoselective Binding.
Eur. J. Inorg. Chem. 2006, 464-72.

83. P. Srinivasan, J.L. Tan and W.K. Leong
Reaction of the Heteronuclear Cluster Cp*IrOs3(μ-H)4(CO)9 with Alkynes: An Unusual Case of Amine Activation.
J. Organomet. Chem. 2006, 691, 1288-94.

84. P.K. Chan, W.K. Leong, K.I. Krummel and M.V. Garland
Aminoethyl-Functionalised Cyclopentadienyl Iridium Complexes: Photochemical C-H Activation and Carbonylation of Cycloalkanes.
Eur. J. Inorg. Chem. 2006, 1568-72.

85. Y.L.K. Tan and W.K. Leong
Reaction of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13 with Toluene.
J. Organomet. Chem. 2006, 691, 2048-54.

86. L.J. Pereira and W.K. Leong
Substitution Derivatives of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13: Monosubstituted Group 15 Derivative.
J. Organomet. Chem. 2006, 691, 2448-56.

87. L.J. Pereira and W.K. Leong
Substitution Derivatives of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13: Disubstituted Group 15 Derivative.
Polyhedron 2006, 25(12), 2392-2400.

88. L.J. Pereira and W.K. Leong
Group 15 Ligand Migration in the Heteronuclear Clusters RuOs3(μ-H)2(CO)12(EPh3) (E = P, As, Sb).
J. Organomet. Chem. 2006, 691, 1941-4.

89. P. Srinivasan and W.K. Leong
The Synthesis of Heteronuclear Clusters Containing Cyclopentadienyl- or Pentamethylcyclopentadienyliridium and Ruthenium or Osmium.
J. Organomet. Chem. 2006, 691, 403-12.

90. P. Srinivasan and W.K. Leong
Ligand Substitution in the Heterometallic Cluster Cp*IrOs3(μ-H)2(CO)10.
J. Organomet. Chem. 2006, 691, 371-9.

91. M.O.E. Ahmed and W.K. Leong
Colloidal Silver Nanoparticles Stabilized by a Water-Soluble Triosmium Cluster.
J. Organomet. Chem. 2006, 691, 1055-60.

92. P. Srinivasan, M.E. Tai and W.K. Leong
Reactivity of the Heteronuclear Cluster Cp*IrOs3(μ-H)2(CO)10 with Some Group 16 Substrates.
J. Organomet. Chem. 2006, 691, 941-51. 

93. V.S. Sridevi, W.K. Leong and Y. Zhu
Catalytic Reductive Coupling of 9-Bromofluorene.
Organometallics 2006, 25(1), 283-8.

94. K.H. Chan, W.K. Leong and K.H.G. Mak
Thermolysis of the Osmium-Antimony Clusters Os3(CO)11(SbMe2Ar): Higher Nuclearity Clusters and Arrested Orthometallation.
Organometallics 2006, 25(1), 250-9.

95. Y.L.K. Tan, C.W.A. Koh, T.B. Lim and W.K. Leong
Reaction of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13 with Diphenylacetylene: An Alkyne Bound to a Tetrahedral Metal Core.
J. Cluster Sci. 2006, 17, 509-16.

96. S.L. Kuan, E.P.L. Tay, W.K. Leong, L.Y. Goh, C.Y. Lin, P.W. Gill, R.D. Webster
Highly Oxidized Ruthenium Organometallic Compounds. The Synthesis and One-Electron Electrochemical Oxidation of [Cp*Ru(IV)Cl2(S2CR)] (Cp* = η5-C5Me5, R = NMe2, NEt2, OiPr).
Organometallics 2006, 25, 6134-41.

97. A.C.W. Koh, L. Chen, W.K. Leong, B.F.G. Johnson, T. Khimyak, J. Lin
Hydrogen or synthesis gas production via the partial oxidation of methane over supported nickel–cobalt catalysts.
Int. J. Hydrogen Energy 2007, 32, 725-30.

98. Y.L.K. Tan and W.K. Leong
Reactivity of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13 with Indene.
J. Organomet. Chem. 2007, 692, 768-72.

99. S.Y. Ng, G. Fang, W.K. Leong, L.Y. Goh, and M.V. Garland
Reactivity and X-ray Structural Studies in Ligand Substitution of [Cp/(Ind)-Ru(dppf)Cl]. Epimerisation in [Cp/(Ind)Ru(Josiphos)Cl] {Cp = η5-C5H5, Ind = η5-C7H9, dppf = 1,1-Bis(diphenylphosphanyl)ferrocene, Josiphos = (R)-(–)-1-[(S)-2-(Diphenylphosphanyl)ferrocenyl]ethyldicyclohexylphosphane}.
Eur. J. Inorg. Chem. 2007, 452-62.

100. S.Y. Ng, W.K. Leong, L.Y. Goh, and R.D. Webster
Indenyl Ruthenium Complexes Containing 1,1'-Bis(diphenylphosphanyl)ferrocene (dppf) and Thiolato Ligands: Synthesis, X-ray Structure Analysis, Electrochemistry and Magnetic Studies.
Eur. J. Inorg. Chem. 2007, 463-71.

101. S.Y. Ng, G.K. Tan, L.L. Koh, W.K. Leong and L.Y. Goh
Tethered Indenyl-Phosphine Complexes of Ruthenium(II) via Reductive Elimination of a Ruthenium(IV) Complex
Organometallics 2007, 26, 3352-61.

102. E.P.L. Tay, S.L. Kuan, W.K. Leong and L.Y. Goh
Synthetic and X-ray Structural and Reactivity Studies of Cp*Ru(IV) Complexes Containing Bidentate Dithio-Carbamate, Xanthate, Carbonate and Phosphinate Ligands (Cp* = η5-C5Me5).
Inorg. Chem. 2007, 46, 1440-50.

103. Y.L.K. Tan and W.K. Leong
The Ditertiary Phosphane-bridged Heteronuclear Cluster RuOs3(μ-H)2(CO)9(μ-CO)2(μ-dppm): Synthesis and Reactivity with Alkynes.
Eur. J. Inorg. Chem. 2007, 1585-98.

104. V.S. Sridevi, W.Y. Fan and W.K. Leong
Stereoselective Hydrosilylation of Terminal Alkynes Catalysed by [Cp*IrCl2]2: A Computational and Experimental Study.
Organometallics 2007, 26, 1157-60.

105. V.S. Sridevi, W.Y. Fan and W.K. Leong
[Cp*IrCl2]2 Assisted C≡C Bond Cleavage with Water: An Experimental and Computational Study.
Organometallics 2007, 26, 1173-7.

106. Y.L.K. Tan and W.K. Leong
The Aromatization of C5 Rings on a Heteronuclear Cluster.
Eur. J. Inorg. Chem. 2007, 2151-60.

107. Y.L.K. Tan and W.K. Leong
Ditertiary Phosphine Derivatives of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13.
J. Organomet. Chem. 2007, 692, 2253-69.

108. S.Y. Ng, J. Tan, W.Y. Fan, W.K. Leong, L.Y. Goh, and R.D. Webster
Synthetic, X-ray Diffraction, Electrochemical and Density Functional Theoretical Studies of (Indenyl)Ruthenium Complexes containing Dithiolate Ligands.
Eur. J. Inorg. Chem. 2007, 3827-40.

109. M.O.E. Ahmed, C. Li and W.K. Leong
Luminescent Silver Nanoparticles Stabilised by a Crown Ether Capped with an Organometallic Cluster.
J. Organomet. Chem. 2007, 692, 3474-8.

110. E.C. Morrison, W.K. Leong and J. Tan
Reduced Overlap Population Analysis of Bis-alkoxy Bridged Triosmium Clusters.
J. Cluster Sci. 2007, 18, 753-63.

111. V.S. Sridevi and W.K. Leong
Catalytic Reductive Homocoupling of 9-Bromofluorene.
Tetrahedron Lett. 2007, 48, 6669-70.

112. V.S. Sridevi and W.K. Leong
The Synthesis and Reactivity of Some Indenyl and Bis-Indenyl Ruthenium Carbonyl Complexes
J. Organomet. Chem. 2007, 692, 4909-16.

113. K.V. Kong, W. Chew, L.H.K. Lim, W.Y. Fan and W.K. Leong
Bioimaging in the mid-infrared using an organometallic carbonyl tag.
Bioconjugate Chemistry 2007, 18, 1370-4.

114. A.C.W. Koh, W.K. Leong, L. Chen, T.P. Ang, J. Lin, B.F.G. Johnson and T. Khimyak
Highly efficient ruthenium and ruthenium-platinum cluster-derived nanocatalysts for hydrogen production via ethanol steam reforming.
Catal. Commun. 2008, 9, 170-5.

115. S.Y. Ng, W.K. Leong, L.Y. Goh and R.D. Webster
Synthesis, X-ray Crystal Structures and Electrochemistry of (Indenyl)ruthenium Complexes Containing dppf and Heterocyclic Thiolato/Thione Ligands.
Eur. J. Inorg. Chem. 2008, 144–151.

116. P.K. Chan and W.K. Leong
The Reaction of Cp*Ir(CO)2 with Activated Perfluoroaromatic Compounds: Formation of Metallocarboxylic Acids via Aromatic Nucleophilic Substitution.
Organometallics 2008, 27, 1247-1253.

117. C. Li and W.K. Leong
The Reaction of Triosmium and –Ruthenium Clusters with Bifunctional Ligands.
J. Organomet. Chem. 2008, 693, 1292-1300.

118. P.K. Chan and W.K. Leong
Reaction of [M(CO)4]- (M = Ir, Rh) with Cyclopropenyl Tetrafluoroborate – Ring Opening and Coupling of Cyclopropenyl Ligands to form Dinuclear Metal Complexes.
J. Organomet. Chem. 2008, 693, 2641-4.

119. C. Li, Z. Zhong and W.K. Leong
Organometallic clusters as precursors for metallic nanoparticles – effect of cluster size, ligand set and decomposition method.
Langmuir 2008, 24, 10427-31.

120. K.V. Kong, W.K. Leong, S. P. Ng, T. H. Nguyen and L.H.K. Lim
Osmium Carbonyl Clusters - A New Class of Apoptosis Inducing Agents.
ChemMedChem 2008, 3, 1269-75.

121. C. Li and W.K. Leong
Thermolysis of Polymeric [Ru(CO)4]ꚙ to Metallic Ruthenium: Molecular Shape of the Precursor Affects the Nanoparticle Shape
Langmuir 2008, 24, 14040-1.

122. C. Li and W.K. Leong
The Deposition of Osmium Carbonyl Clusters onto Inorganic Oxide Surfaces: A ToF-SIMS and IR Spectroscopic Study of the Surface Species
J. Colloid Int. Sci. 2008, 328, 29-33.

123. K.V. Kong, W.K. Leong and L.H.K. Lim
Induction of Apoptosis by Hexaosmium Carbonyl Clusters.
J. Organomet. Chem. 2009, 694, 834-9.

124. W.L.J. Leong, M.V. Garland, L.Y. Goh and W.K. Leong
Synthesis of Cyclopentadienyl Ruthenium(II) Complexes Containing Tethered Functionalities
Inorg. Chim. Acta 2009, 362, 2089-92.

125. C. Li, W.K. Leong and K. P. Loh
Deposition of osmium and ruthenium thin films from organometallic cluster precursors
Appl. Organomet. Chem. 2009, 23, 196-9.

126. C. Li, W.K. Leong and Z. Zhong
Metallic osmium and ruthenium nanoparticles for CO oxidation
J. Organomet. Chem. 2009, 694, 2315-8.

127. K.V. Kong, W.K. Leong and L.H.K. Lim
Osmium carbonyl clusters containing labile ligands induce apoptosis via the hyper-stabilization of microtubules
Chem. Res. Toxicol. 2009, 22, 1116-22.

128. A.C.W. Koh, L. Chen, W.K. Leong, T.P. Ang, B.F.G. Johnson, T. Khimyak and J.Lin
Ethanol steam reforming over supported ruthenium and ruthenium-platinum catalysts: Comparison of organometallic clusters and inorganic salts as catalyst precursors
Int. J. Hydrogen Energy 2009, 34, 5691-5703.

129. C. Li, W.Y. Fan and W.K. Leong
Osmium Carbonyl Clusters on Gold and Silver Nanoparticles as Models for Studying the Interaction with the Metallic Surface
J. Phy. Chem. C 2009, 113, 18562-9.

130. C. Amatore, S. Arbault, G. Jaouen, A.C.W. Koh, W.K. Leong, S. Top, M.-A. Valleron and C.H. Woo
Pro-oxidant Properties of Zidovudine (AZT) and other Thymidine-Analogues in Macrophages Evaluated at the Single Cell Level by Amperometry: Implication of the Azido Moiety in Oxidative Stress
ChemMedChem 2010, 5, 296-301.

131. E. Kumaran, V.S. Sridevi and W.K. Leong
Orthometalated Amino-Carbene Derivatives of Iridium via Anilines and Terminal Alkynes
Organometallics 2010, 29, 6417-21.

132. Y.L.K. Tan and W.K. Leong
Reaction of the Heteronuclear Cluster RuOs3(μ-H)2(CO)13 with Azulenes
J. Organomet. Chem. 2011, 696, 2373-9.

133. S. Yan, M. Seidel, Z. Zhang, W.K. Leong and H.-S. Tan
Ultrafast vibrational relaxation dynamics of carbonyl stretching modes in Os3(CO)12
J. Chem. Phy. 2011, 135, 024501-10.

134. R. Ganguly and W.K. Leong
Mechanism and Activation Parameters for the κO to μ,κ2O,O' Bonding Mode of the Maleic Acid Ligand on an Osmium Carbonyl Cluster
Organometallics 2011, 30, 3966-70.

135. S.P. Oh, B.Y. Chor, W.Y. Fan, Y. Li and W.K. Leong
Ru4(CO)8(OOCAd)4(PPh3)2: Phosphine Derivative of An Electron-Deficient Linear Tetraruthenium Cluster
Organometallics 2011, 30, 6774-7.

136. S.L. Kuan, W.K. Leong, R.D. Webster and L.Y. Goh
Mixed-sandwich Cp*Cr Complexes Containing Poly(methimazolyl)borates (Cp* = C5Me5) – Syntheses, Structural and Electrochemical Studies
Organometallics 2012, 31, 273-81.

137. E. Kumaran and W.K. Leong
Rhodium(III) Catalysed Hydroamination of Aromatic Terminal Alkynes with Anilines
Organometallics 2012, 31, 1068-72.

138. Y.L.K. Tan, P. Pigeon, S. Top, E. Labbé, O. Buriez, E.A. Hillard, A. Vessières, C. Amatore, W.K. Leong and G. Jaouen
Ferrocenyl catechols: Synthesis, oxidation chemistry and anti-proliferative effects on MDA-MB-231 breast cancer cells
Dalton Trans. 2012, 41, 7537-49.

139. E. Kumaran and W.K. Leong
The Reaction of [Cp*RhCl2]2, Aniline and a Terminal Alkyne - Formation of Cyclometallated Rhodium(III) Complexes
Organometallics 2012, 31, 4849-53.

140. S.L. Kuan, W.K. Leong, R.D. Webster and L.Y. Goh
Mixed-sandwich (Cp*/(HMB))Ru Complexes Containing bis(methimazolyl)(pyrazolyl)borate (Cp* = η5-C5Me5, HMB = η6-C6Me6)
Organometallics 2012, 31, 5159-68.

141. K.V. Kong, Z. Lam, W.D. Goh, W.K. Leong, M. Olivo
Metal Carbonyl-Gold Nanoparticle Conjugates for Live-Cell SERS Imaging
Angew. Chem. Int. Ed. 2012, 51, 9796-9.

142. H.-L. Seng, W.-S. Wang, S.-M. Kong, H.-K.A. Ong, Y.-F. Win, R.N.Z.R.A. Rahman, M. Chikira, W.-K. Leong, M. Ahmad, S.-B.A. Khoo, C.-H. Ng
Biological and cytoselective anticancer properties of copper(II)-polypyridyl complexes modulated by auxiliary methylated glycine ligand
Biometals 2012, 25, 1061-81.

143. J.Y. Lee, W.Y. Fan, K.H.G. Mak, W.K. Leong
The Formation of Aldehydes from the Photochemically Activated Reaction of Cp*Ir(CO)(Cl)(CH2R) Complexes with Water
J. Organomet. Chem. 2013, 724, 275-80.

144. K.H.G. Mak, P.K. Chan, W.Y. Fan, R. Ganguly, W.K. Leong
Photochemical Reaction of Cp*Ir(CO)2 with C6F5X (X = CN, F): Formation of Diiridium(II) Complexes
Organometallics 2013, 32, 1053-9.

145. K.H.G. Mak, W.Y. Fan, V.S. Sridevi and W.K. Leong
The Reaction of [Cp*IrCl2]2 with 2-Methyl-1-butene-3-yne: Formation of a η3-Tetraenyl Transition Metal Complex
J. Organomet. Chem. 2013, 739, 52-6.

146. K.N. Wong, K.H.G. Mak, W.Y. Fan, V.S. Sridevi and W.K. Leong
Iridafurans from the Reaction of [Cp*IrCl2]2 with Carbonyl Conjugated Terminal Alkynes
J. Organomet. Chem. 2013, 741, 40-6.

147. K.H.G. Mak, P.K. Chan, W.Y. Fan, W.K. Leong and Y. Li
Reactions of Cp*Ir(CO)2 with Pentafluorobenzonitrile: Half-Sandwich Iridium Complexes Cp*Ir(CO)(p-C6F4CN)(X)
J. Organomet. Chem. 2013, 741-2, 176-80.

148. E. Kumaran, K.T.S. How, R. Ganguly, Y. Li and W.K. Leong
Synthesis and Reactivity of Cationic Iridium Amino-Carbenes Derived from Terminal Alkynes and 2-Aminopyridines
Organometallics 2013, 32, 4149-52.

149. C.-H. Ng, W.-S. Wang, K.-V. Chong, Y.-F. Win, K.-E. Neo, H.-B. Lee, S.-L. San, R.N.Z.R.A. Rahman and W.K. Leong
Ternary copper(II)-polypyridyl enantiomers: aldol-type condensation, characterization, DNA-binding recognition, BSA-binding and anticancer property
Dalton Trans. 2013, 42, 10233-43.

150. Y. Liu, R. Ganguly, H.V. Huynh and W.K. Leong
Direct evidence for the attack of a free N-heterocyclic carbene at a carbonyl ligand: A zwitterionic osmium carbonyl cluster
Angew. Chem. Int. Ed. 2013, 52, 12110-3.

151. K.V. Kong, Z. Lam, W.K.O. Lau, W.K. Leong, M. Olivo
A Transition Metal Carbonyl Probe for Use in a Highly Specific and Sensitive SERS-based Assay for Glucose
J. Amer. Chem. Soc. 2013, 135, 18028-31.

152. Y. Liu, R. Ganguly, H.V. Huynh and W.K. Leong
Palladium-Osmium Heterometallic Clusters Containing NHC Ligands
Organometallics 2013, 32, 7559-63.

153. H.Z.S. Lee, W.K. Leong, S. Top and A. Vessières
Cytotoxic Triosmium Carbonyl Clusters: An SAR Study
ChemMedChem 2014, 9, 1453-7.

154. J.W. Teo, V.S. Sridevi and W.K. Leong
N-Metallacycles from [Cp*MX2]2 (M = Rh or Ir) and Alkynylpyridines: Synthesis, Reaction Pathway and Aromaticity
Organometallics 2014, 33, 1174-80.

155. Y.-Z. Li, R. Ganguly and W.K. Leong
Oxidative addition across Sb-H and Sb-Sb bonds by an osmium carbonyl cluster: Trapping the intermediate
Organometallics 2014, 33, 823-8.

156. K.V. Kong, L. Liao, Z. Lam, N.V. Thakor, W.K. Leong and M. Olivo
Organometallic Carbonyl Clusters: A New Class of Contrast Agents for Photoacoustic Cerebral Vascular Imaging
Chem. Commun. 2014, 50, 2601-3.

157. H.T. Poh, B.T. Sim, T.S. Chwee, W.K. Leong and W.Y. Fan
The Dithiolate-Bridged Diiron Hexacarbonyl Complex Na2[(μ-SCH2CH2COO)Fe(CO)3]2 as a Water-Soluble PhotoCORM
Organometallics 2014, 33, 959-63.

158. E. Kumaran, W.Y. Fan and W.K. Leong
[Cp*IrCl2]2 Catalysed Formation of 2,2'-Biindoles from 2-Ethynylanilines
Organic Letts. 2014, 16, 1342-5.

159. H.Z.S. Lee, O. Buriez, E. Labbé, S. Top, P. Pigeon, G. Jaouen, C. Amatore and W.K. Leong
Oxidative Sequence of a Ruthenocene-Based Anti-Cancer Drug Candidate in a Basic Environment
Organometallics 2014, 33, 4940-6.

160. Y.-Z. Li, R. Ganguly and W.K. Leong
Binuclear Oxidative Addition of Sb-Cl Bonds: A Facile Synthetic Route to Main Group-Transition Element Clusters and Rings
Organometallics 2014, 33, 3867-76.

161. K.V. Kong, W.K. Leong, Z. Lam, T. Gong, D. Goh, W.K.O. Lau and M. Olivo
A Rapid and Label-Free SERS Detection Method for Biomarkers In Clinical Biofluids
Small 2014, 10, 5030-4.

162. E. Kumaran and W.K. Leong
[Cp*IrCl2]2-catalysed Cyclisation of 2-Alkynylanilines to Indoles
Tetrahedron Lett. 2014, 55, 5495-8.

163. S.P. Oh, Y.-Z. Li and W.K. Leong
Os3(CO)11(BiPh3): The Missing Link in Osmium-Bismuth Cluster Chemistry
J. Organomet. Chem. 2015, 783, 46-8.

164. E. Kumaran and W.K. Leong
[Cp*RhCl2]2-Catalyzed Alkyne Hydroamination to 1,2-Dihydroquinolines
Organometallics 2015, 34, 1779-82.

165. Y.-Z. Li, R. Ganguly, W.K. Leong and Y. Liu
Synthesis and Reactivity of Ruthenium-Antimony Carbonyl Clusters
Eur. J. Inorg. Chem. 2015, 3861-72.

166. H.Z.S. Lee, O. Buriez, F. Chau,  E. Labbé, R. Ganguly, C. Amatore, G. Jaouen, A. Vessières, W.K. Leong, S. Top
Synthesis, characterization, and biological properties of osmium-based tamoxifen derivatives. Comparison with their homologues in the iron and ruthenium series
Eur. J. Inorg. Chem. 2015, 4217-26.

167. K.H. Chan and W.K. Leong
Bonding and Reactivity of Arene-Trinuclear Ruthenium/Osmium Clusters
In: Reedijk, J. (Ed.) Elsevier Reference Module in Chemistry, Molecular Sciences and Chemical Engineering. Waltham, MA: Elsevier, 2015.

168. Y.-Z. Li and W.K. Leong
Raft-like Osmium- and Ruthenium-Antimony Carbonyl Clusters
J. Organomet. Chem., 2016, 812, 217-25.

169. B.Y. Chor, R. Ganguly and W.K. Leong
Electron-deficient linear tetranuclear ruthenium(I) carboxylate chains
J. Organomet. Chem. 2016, 802, 15-20.

170. B.Y. Chor, R. Ganguly and W.K. Leong
Convenient Route to an Electron-deficient Tetraosmium(I) carboxylate chains
J. Organomet. Chem. 2016, 804, 114-7.

171. Z. Lam, K.V. Kong, M. Olivo and W.K. Leong
The Vibrational Spectroscopy of Metal Carbonyls for Bio-Imaging and –Sensing
Analyst 2016, 141, 1569-86.

172. Y. Li, P.K. Chan and W.K. Leong
C-C Reductive Coupling Mediated by Attack at a Spectator Ligand
J. Organomet. Chem. 2016, 810, 40-5.

173. E.K.S. Shim, W.K. Leong, Y.-Z. Li and M.G. Richmond
Isomerization of the Osmium-Tellurium Cluster Os3(μ-TeR)2(CO)10: A Kinetic and Computational Study
Dalton Trans. 2016, 45, 7158-62.

174. Y.-Z. Li, R. Ganguly and W.K. Leong
Oxidative Addition of Halogen Across an Os-Os or Os-Sb Bond: Formation of Five-Membered Osmium-Antimony Carbonyl Rings
J. Organomet. Chem. 2016, 811, 66-73.

175. M.O. Ahmed, H.T. Al-Masri, W.K. Leong and R. Ganguly
Tuning the emission colour of cyclometalated iridium complex by extending the π-electron delocalization of the aromatic chromophore: Synthesis, photophysical properties and X-ray crystal structure
Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry 2016, 46, 1695-1700.

176. Z. Lam, G. Balasundaram, K.V. Kong, B.Y. Chor, D. Goh, B. Khezri, R.D. Webster, W.K. Leong and M. Olivo
High Nuclearity Carbonyl Clusters as Near-IR Contrast Agents for Photoacoustic In Vivo Imaging
J. Mat. Chem. B 2016, 4, 3886-91.

177. V. Scalcon, S. Top, H.S. Lee, A. Citta, A. Folda, A. Bindoli, W.K. Leong, M. Salmain, A. Vessières, G. Jaouen, M. Pia Rigobello
Osmocenyl-tamoxifen derivatives target the thioredoxin system leading to a redox imbalance in Jurkat cells
J. Inorg Biochem. 2016, 160, 296-304.

178. Y. Li, R. Ganguly and W.K. Leong
An Arbuzov-type Reaction with the Bis(alkynyl) Iridium Complex [Cp*Ir(L)(C≡CAr)2]
J. Organomet. Chem. 2016, 818, 42-7.

179. Y. Li and W.K. Leong
Intramolecular Cycloaddition in the Iridium Diyne Complexes [Cp*Ir(CO)(η2-ArC≡CC≡CAr)]: An Experimental and Computational Study
Eur. J. Inorg. Chem. 2016, 4769-73.

180. Y.-Z. Li, R. Ganguly and W.K. Leong
Ligand Substitution in the Osmium-Antimony Rings Os3(μ-SbPh2)2(CO)10 and Os3(μ-SbPh2)3(Cl)(CO)9
J. Organomet. Chem. 2016, 820, 46-54.

181. Y.-Z. Li, R. Ganguly and W.K. Leong
Expedient Synthesis of a Metallostibine Os2(CO)8(μ-SbPh): An Unusual and Strong Two-electron Donor Ligand
Eur. J. Inorg. Chem.2017, 2541-6.

182. M. Jiang, C.H. Yau, Y. Hu, Y.L.K. Tan, Y. Li, R. Ganguly and W.K. Leong
Synthesis, Characterization, and Crystal Structures of Diruthenium Complexes Containing Bridging Salicylato Ligands
Z. Anorg. Allg. Chem. 2017, 643, 878-82.

183. B.Y. Chor,W.X. Koh, R. Ganguly, Y. Li, L. Chen, R. Raja and W.K. Leong
Cobalt-Platinum Heterometallic Clusters Containing N-Heterocyclic Carbene Ligands
J. Organomet. Chem. 2017, 849-50, 48-53.

184. E. Kumaran and W.K. Leong
Iridium-Catalyzed Carbonyl Group-Directed Oxidative Coupling of Arenes with Alkenes
Tetrahedron Lett. 2018, 59, 113-6.

185. Y.-Z. Li, R. Ganguly, D.R. Rajaratnam and W.K. Leong
The Metallostibine Os2(CO)8(μ-SbPh): A Versatile Donor Precursor for Antimony-Containing Heterometallic Clusters
J. Organomet. Chem. 2018, 858, 53-61.

186. C. kr Barik, R. Ganguly, Y. Li and W.K. Leong
Structural Mimics of the [Fe]-Hydrogenase: A Complete Set for the Group VIII Metals
Inorg. Chem. 2018, 57, 7113-7120.

187. C. kr Barik, R. Ganguly, Y. Li, C. Przybylski, M. Salmain and W.K. Leong
Embedding a Ruthenium-based Structural Mimic of the [Fe]-Hydrogenase Cofactor into Papain
Inorg. Chem. 2018, 57, 12206-12.

188. Y.-Z. Li, R. Ganguly, K.Y. Hong, Y. Li, M.E. Tessensohn, R.D. Webster and W.K. Leong
Stibine-Protected Au13 Nanoclusters: Syntheses, Properties and Facile Conversion to GSH-Protected Au25 Nanocluster
Chem. Sci. 2018, 9, 8723-30.

189. E. Kumaran and W.K. Leong
Gold(0) Catalyzed Dehydrogenation of N-heterocycles
Tetrahedron Lett. 2018, 59, 3958-60.

190. C. kr Barik, R. Ganguly, Y. Li and W.K. Leong
Ruthenacyclic carbamoyl complexes: Highly efficient catalysts for organosilane hydrolysis
Eur. J. Inorg. Chem. 2018, 4982-6.

191. E. Kumaran and W.K. Leong
Rapid Size-Focusing of Gold Nanoclusters with an Oxidant
J. Cluster Sci. 2019, 30, 1-4.

192. D. Lin, Y.-C. Lin, S.-W. Yang, L. Zhou, W.K. Leong, S.-Y. Feng, K.V. Kong
Organometallic-Constructed Tip-Based Dual Chemical Sensing by Tip-Enhanced Raman Spectroscopy for Diabetes Detection
ACS Appl Mat. & Interfaces 2018, 10, 41902-8.

193. Y.-Z. Li and W.K. Leong
A comparative study on atomically precise Au nanoclusters as catalysts for the aldehyde–alkyne–amine (A3) coupling reaction: Ligand effects on the nature of the catalysis and efficiency
RSC Advances 2019, 9, 5475-9.

194. C.kr Barik, R. Ganguly, Y. Li and W.K. Leong
Very Strong Trans Effect in Ruthenacyclic Carbamoyl Complexes Leads to Ligand Redistribution in Phosphine Derivatives
J. Organomet. Chem. 2019, 887, 5-11.

195. C. kr Barik, M.E. Tessensohn, R.D. Webster and W.K. Leong
Group VIII Carbamoyl Complexes as Catalysts for Alkyne Hydrocarboxylation and Electrochemical Proton Reduction
J. Organomet. Chem. 2019, 889, 40-4.

196. Y. Liu, R. Ganguly, H.V. Huynh and W.K. Leong
Platinum-Osmium Heterometallic Clusters Containing N-Heterocyclic Carbene Ligands and an Electron Deficient Tetraosmium Byproduct
Eur. J. Inorg. Chem. 2019, 1966-9.