A Cationic Rh(III) Complex That Efficiently Catalyzes Hydrogen Isotope Exchange in Hydrosilanes
作者:Jesús Campos、Ana C. Esqueda、Joaquín López-Serrano、Luis Sánchez、Fernando P. Cossio、Abel de Cozar、Eleuterio Álvarez、Celia Maya、Ernesto Carmona
DOI:10.1021/ja108521b
日期:2010.12.1
The synthesis and structural characterization of a mixed-sandwich (η(5)-C(5)Me(5))Rh(III) complex of the cyclometalated phosphine PMeXyl(2) (Xyl = 2,6-C(6)H(3)Me(2)) with unusual κ(4)-P,C,C',C'' coordination (compound 1-BAr(f); BAr(f) = B(3,5-C(6)H(3)(CF(3))(2))(4)) are reported. A reversible κ(4) to κ(2) change in the binding of the chelating phosphine in cation 1(+) induced by dihydrogen and hydrosilanes
环金属化膦 PMeXyl(2) (Xyl = 2,6-C(6)H) 的混合夹心 (η(5)-C(5)Me(5))Rh(III) 复合物的合成和结构表征(3)Me(2)) 具有不寻常的 κ(4)-P,C,C',C'' 配位(化合物 1-BAr(f);BAr(f) = B(3,5-C(6))报告了 H(3)(CF(3))(2))(4))。由二氢和氢硅烷诱导的阳离子 1(+) 中螯合膦结合的可逆 κ(4) 到 κ(2) 变化触发了高效的 Si-H/Si-D(或 Si-T)交换,适用于范围广泛的氢硅烷。催化可以在有机溶剂溶液或无溶剂中进行,催化剂负载量低至 0.001 mol%,催化剂可以循环使用多次。