Reduction of CO<sub>2</sub> by Hydrosilanes in the Presence of Formamidinates of Group 13 and 12 Elements
作者:Weiheng Huang、Thierry Roisnel、Vincent Dorcet、Clement Orione、Evgueni Kirillov
DOI:10.1021/acs.organomet.9b00853
日期:2020.3.9
initiation step the binary catalytic systems undergo a complex transformation in the presence of CO2/Et3SiH, affording the products of 1-Al decomposition: namely, (C6F5)N(H)SiEt3, (C6F5)N(Me)SiEt3, NCN}SiEt3, and also some unidentified aluminum species. Thus, the overall process of the reduction of CO2 with hydrosilanes is presumed to be catalyzed by complex multisite systems, evolved from the formamidinate
均配型络合物1-M组13和12层的元件(M = B-In和M =锌,分别地)结合的吸电子配体甲脒盐(C 6 ˚F 5)N═CHN(C 6 ˚F 5)} -(合成并以高收率分离出NCN} -)。通过X射线晶体学,NMR光谱和元素分析来表征化合物。虽然单组分1-M在用氢硅烷还原CO 2时似乎反应迟钝或不活泼,但衍生自1-M和E(C 6 F5)3(E = B,Al)。特别是,二元组合1-Al / B(C 6 F 5)3在整个系列中表现出最好的性能,因此在一定条件下(P CO 2,温度,苯)可提供定量的氢化硅烷(Et 3 SiH)转化率或溴苯溶剂),并主要提供CH 2(OSiEt 3)2和CH 4作为产物。动力学和机理研究表明,在引发步骤中,二元催化体系在存在CO 2 / Et 3的情况下经历复杂的转化SiH,产生1-Al分解产物:(C 6 F 5)N(H)SiEt 3,(C 6 F 5)N(Me)SiEt