这项工作描述了易于制备的钴纳米颗粒(NPs)在溶液中的发展,作为与工业相关的叔硅烷1,1,1,3,5,5,5,5-七甲基三硅氧烷(MD H M )。当在30°C的甲苯中使用3.5到7 h时,Co NPs表现出高活性,催化剂负载量为0.05-0.2 mol%,不含添加剂。在这些温和条件下,发现一组末端烯烃与MD H反应M,仅以高达99%的产率生产抗马氏蛋白产物。此外,我们证明了使用紫外线辐照进一步活化这些钴纳米颗粒的可能性,不仅可以增强它们的催化性能,而且还可以使用内部烯烃(其中包括不饱和脂肪酸酯(油酸甲酯))促进串联异构化-氢化硅烷化反应,从而生成线性产物达到定量产量。
A Pt(0) complex with cyclic (alkyl)(amino)silylene and 1,3-divinyl-1,1,3,3-tetramethyldisiloxane ligands: synthesis, molecular structure, and catalytic hydrosilylation activity
A platinum(0) complex bearing a cyclic (alkyl)(amino)silylene and a 1,3-divinyl-1,1,3,3-tetramethyldisiloxane (DVTMS) was synthesized and isolated in the form of colorless crystals. The single-crystal X-ray diffraction analysis of this complex in combination with theoretical calculations indicated that the Pt→Si π-back-donation in this complex is weaker than that in the corresponding cyclic-dialkylsilylene-ligated
The low temperature regioselective hydrosilylation of various alkenes with (1,1,1,3,5,5,5-heptamethyltrisiloxane) MDHM is described using Mn2(CO)10 under UV irradiation with Mn loadings as low as 1 mol%, in the absence of additives and with excellent selectivity and yields.