<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。
Waste-free and efficient hydrosilylation of olefins
High purity silicone precursors can now be synthesized by hydrosilylation of solvent-free olefins catalyzed by a highly stable and active glass hybrid catalyst consisting of mesoporous organosilica microspheres doped with Pt nanoparticles.
Markovnikov Hydrosilylation of Alkynes with Tertiary Silanes Catalyzed by Dinuclear Cobalt Carbonyl Complexes with NHC Ligation
作者:Dongyang Wang、Yuhang Lai、Peng Wang、Xuebing Leng、Jie Xiao、Liang Deng
DOI:10.1021/jacs.1c06583
日期:2021.8.18
with PhC≡CH and HSiEt3 can furnish the dinuclear cobalt alkyne and mononuclear cobalt silyl complexes [(IPr)(CO)2Co(μ–η2:η2-HCCPh)Co(CO)3], [(IPr)(CO)2Co(μ-η2:η2-HCCPh)Co(CO)2(IPr)], and [(IPr)Co(CO)3(SiEt3)], respectively. Both dicobalt bridging alkyne complexes can react with HSiEt3 to yield α-triethylsilyl styrene and effect the catalytic Markovnikov hydrosilylation reaction. However, the mono(NHC)
1H, 13C and 29Si NMR study of α- and β-silylstyrenes and their adducts with dichlorocarbene
作者:E. Liepiņs̆、Yu. Goldberg、I. Iovel、E. Lukevics
DOI:10.1016/s0022-328x(00)99405-1
日期:1987.12
1H, 13C and 29Si NMR spectra for the α- and β-silylstyrenes (E)-PhCHCHSiR3 (I) and PhC(SiR3)CH2 (II) (R = Cl, Me, Ph), and those for some dichlorocarbene adducts of I and II (R = Me, Ph), were examined. From the 13C NMR data, the phenyl substituent in the molecules I and II enhances the electronic effects of the organosilicon substituent at Cα, and weakens these effects on the Cα resonance. The degree
Silole skeletons are constructed by ring-closing olefin metathesis of silicon-tethered dienes and trienes. A silicon-tethered enyne is also converted to a 2-alkenyl-1-silaindene via ruthenium-catalyzed ring-closing enyne metathesis.