Conformational Isomerism in Monomeric, Low-Coordinate Group 12 Complexes Stabilized by a Naphthyl-Substituted<i>m</i>-Terphenyl Ligand
作者:Benjamin M. Gridley、Graeme J. Moxey、William Lewis、Alexander J. Blake、Deborah L. Kays
DOI:10.1002/chem.201301872
日期:2013.8.19
low‐coordinate bis(terphenyl) complexes of the Group 12 metals, [Zn(2,6‐Naph2C6H3)2] (1), [Cd(OEt2)(2,6‐Naph2C6H3)2] (2) and [Hg(OEt2)(2,6‐Naph2C6H3)2] (3) (Naph=1‐C10H7) are described. The naphthyl substituents of the terphenyl ligands confer considerable steric bulk, and as a result of limited flexibility introduce multiple conformations to these unusual systems. In the solid state, complex 1 features a two‐coordinate
第12组金属[Zn(2,6-Naph 2 C 6 H 3)2 ](1),[Cd(OEt 2)( 2,6‐Naph 2 C 6 H 3)2 ](2)和[Hg(OEt 2)(2,6-Naph 2 C 6 H 3)2 ](3)(Naph = 1‐C 10 H 7)进行了说明。三联苯配体的萘基取代基具有相当大的空间体积,并且由于柔韧性有限,导致这些不寻常系统具有多种构象。在固态中,配合物1的特征是具有两个坐标的Zn中心,且配体的取向为syn / anti构象,而具有三坐标畸变的T形配合物2和3的特征为配体处于syn / syn构型。DFT计算的结果与这些配合物的固态配置非常吻合,并支持光谱测量,表明溶液中存在多个构象异构体。