Cyclometalated Products of [(COE)<sub>2</sub>RhCl]<sub>2</sub> and 1,3-(RSCH<sub>2</sub>)<sub>2</sub>C<sub>6</sub>H<sub>4</sub> (R = <i><sup>t</sup></i>Bu, <i><sup>i</sup></i>Pr) Are Dimeric. Synthesis, Molecular Structures, and Solution Dynamics of [μ-ClRh(H)(RSCH<sub>2</sub>)<sub>2</sub>C<sub>6</sub>H<sub>3</sub>-2,6]<sub>2</sub>
作者:Daniel R. Evans、Mingsheng Huang、W. Michael Seganish、Esther W. Chege、Yiu-Fai Lam、James C. Fettinger、Tracie L. Williams
DOI:10.1021/ic011189y
日期:2002.5.1
Two tridentate thioether pincer ligands, 1,3-(RSCH(2))(2)C(6)H(4) (R = (t)()Bu, 1a; R = (i)()Pr, 1b) underwent cyclometalation using [(COE)(2)RhCl](2) in air/moisture-free benzene at room temperature. The resultant complexes, [mu-ClRh(H)(RSCH(2))(2)C(6)H(3)-2,6](2) (R = (t)Bu, 2a; R = (i)Pr, 2b) are dimeric both in the solid state and in solution. A battery of variable-temperature one- and two-dimensional
两个三齿硫醚钳状配体1,3-(RSCH(2))(2)C(6)H(4)(R =(t)()Bu,1a; R =(i)()Pr,1b)在室温下使用[(COE)(2)RhCl](2)在空气/无湿苯中进行环金属化。生成的络合物[mu-ClRh(H)(RSCH(2))(2)C(6)H(3)-2,6](2)(R =(t)Bu,2a; R =(i )Pr,2b)在固态和在溶液中都是二聚体。一连串可变温度的一维和二维(1)H NMR实验表明,两种络合物在溶液中均发生动态交换。溶液中2a的两个二聚体非对映体之间的交换通过绕Rh-C(ipso)键旋转而发生。2b的动态交换更为复杂,因为发生了另一种交换机制,即硫转化,这导致溶液中几种非对映异构体之间的交换。