<i>N</i>-heterocyclic carbene platinum complexes functionalized with a polyether chain and silyl group: Synthesis and application as a catalyst for hydrosilylation
GRAPHICAL ABSTRACT ABSTRACT The synthesis and characterization of new N-heterocycliccarbeneplatinum(II) complexes functionalized with a polyether chain and silyl group are described. In addition, their application towards the catalytic hydrosilylation of unsaturated carbon–carbon bonds, including alkenes, alkynes, vinyl ether, and unsaturated esters, is reported. These new complexes exhibit both
图形摘要 摘要描述了用聚醚链和甲硅烷基官能化的新型 N-杂环卡宾铂 (II) 配合物的合成和表征。此外,还报道了它们在不饱和碳-碳键(包括烯烃、炔烃、乙烯基醚和不饱和酯)的催化氢化硅烷化中的应用。这些新的配合物表现出优异的催化活性和氢化硅烷化选择性。催化系统可循环使用 >27 次。
New organoplatinum (IV) complex with quaterpyridine ligand: Synthesis, structure and its catalytic activity in the hydrosilylation of styrene and terminal alkynes
The reaction of ligand L with PtCl2 leads to a novel structural motif of octahedral ortho-metalated complex of formula [Pt(L-H)Cl-3] I. This result is a consequence of drastic conditions of reaction and preferred Pt(IV) octahedral coordination geometry. The new compound has been characterised on the basis of the spectroscopic data in solution, and its structure confirmed in the solid state by X-ray crystallography (1a-[Pt(L-H)Cl-3].MeOH, 1b-[Pt(LH)Cl-3]center dot C6H5CH3). This article reports organoplatinum (IV) complex 1 as effective and highly selective catalyst precursor in the hydrosilylation of styrene and terminal alkynes. (C) 2013 Elsevier B.V. All rights reserved.
Synthesis of MCM-41-supported Mercapto and Vinyl Platinum Complex Catalyst for Hydrosilylation
作者:Zhigang Ye、Hongxin Shi、Haimin Shen
DOI:10.1080/10426507.2015.1012202
日期:2015.10.3
A mesoporous crystalline material (MCM-41)-supported mercapto and vinyl platinum complex [MCM-41-(SH-Pt)-(Vi-Pt)] was prepared and characterized by Fourier Transform-Infrared spectroscopy, thermogravimetry, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The catalytic activity of MCM-41-(SH-Pt)-(Vi-Pt) was evaluated through the hydrosilylation of styrene with methyldiethoxysilane. MCM-41-(SH-Pt)-(Vi-Pt) shows superior activity for hydrosilylation compared with MCM-41-Vi-Pt and MCM-41-SH-Pt respectively, but the selectivity of three catalysts is almost the same. The catalyst MCM-41-(SH-Pt)-(Vi-Pt) could efficiently be recovered by a simple filtration and reused in four consecutive cycles without significant loss of catalytic activity and selectivity.