Platinum(II) complexes with polydentate N-heterocyclic carbenes: synthesis, structural characterization and hydrosilylation catalysis

Chunxin Lu; Shaojin Gu; Wanzhi Chen; Huayu Qiu

doi:10.1039/b924587a

Platinum(II) complexes with polydentate N-heterocyclic carbenes: synthesis, structural characterization and hydrosilylation catalysis

Dalton Trans. 2010 May 7;39(17):4198-204. doi: 10.1039/b924587a. Epub 2010 Mar 24.

Authors

Chunxin Lu¹, Shaojin Gu, Wanzhi Chen, Huayu Qiu

Affiliation

¹ Department of Chemistry, Zhejiang University, Xixi Campus, Hangzhou, 310028, People's Republic of China.

PMID: 20390184
DOI: 10.1039/b924587a

Abstract

The platinum(II) complexes of multidentate N-heterocyclic carbenes, [Pt(L1)(2)Cl](PF(6)) (1, L1 = N-methyl-N-(2-pyrimidinyl)imidazolylidene), [Pt(L2)Cl](PF(6)) (2, L2 = N-butyl-N-(1,10-phenanthrolin-2-yl)imidazolylidene), [PtL3](PF(6))(2) (3, L3 = bis(N-picolylimidazolylidenyl)methane), [PtL4](PF(6))(2) (4, L4 = (bis(N-2-pyrimidylimidazolylidenyl)methane) (4) and [Pt(L5)(2)](PF(6))(2) [5, L5 = bis(N-pyridylimidazoliumyl)methane] have been synthesized and structurally characterized. All these complexes exhibit slightly distorted square-planar configuration. These complexes are efficient catalyst precursors for hydrosilylation of alkynes. Complexes 2 and 4 are much more active than complexes 1, 3 and 5. In the hydrosilylation of arylacetylenes, relatively long induction periods were observed for 1, 3 and 5.