β-(Z) Selectivity Control by Cyclometalated Rhodium(III)–Triazolylidene Homogeneous and Heterogeneous Terminal Alkyne Hydrosilylation Catalysts
作者:Beatriz Sánchez-Page、Julen Munarriz、M. Victoria Jiménez、Jesús J. Pérez-Torrente、Javier Blasco、Gloria Subias、Vincenzo Passarelli、Patricia Álvarez
DOI:10.1021/acscatal.0c03295
日期:2020.11.20
XPS and extended X-ray absorption fine structure (EXAFS) spectroscopy, showing the replacement of the iodido ligand by O-functionalities on the carbon wall. In sharp contrast with the homogeneous catalyst, the heterogeneous hybrid catalyst TRGO-Triaz-Rh(III) is not active at room temperature although it shows an excellent catalytic performance at 60 °C. In addition, the hybrid catalyst TRGO-Triaz-Rh(III)
环金属化的Rh(III)-NHC化合物[Cp * RhI(C,C')-Triaz](Triaz = 1,4-二苯基-3-甲基-1,2,3-三唑-5-亚萘基)和[Cp * RhI(C,C')-Im](Im = 1-苯基-3-甲基-咪唑-2-亚烷基)是有效的催化剂,可用于末端炔烃的氢化硅烷化,对热力学不稳定的β-具有完全的区域和立体选择性(Z)-乙烯基硅烷异构体在室温下在氯仿或丙酮中。催化剂[Cp * RhI(C,C')-Triaz]在活性方面表现出优异的催化性能,已被应用于各种线性1-炔烃和苯基乙炔衍生物与各种氢化硅烷(包括HSiMePh 2,HSiMe)的氢化硅烷化反应2相,HSiEt 3,以及体积较大的七甲基氢三硅氧烷(HMTS),以定量收率得到相应的β-(Z)-乙烯基硅烷。石墨烯基杂化材料TRGO-Triaz-Rh(III),具有环金属化的[Cp * RhI(C,C')-Triaz](Triaz