Effect of Ligand Substituent Coordination on the Geometry and the Electronic Structure of Cu(II)-Diradical Complexes
作者:Richa Rakshit、Samir Ghorai、Soumava Biswas、Chandan Mukherjee
DOI:10.1021/ic402612v
日期:2014.4.7
Two organic moieties, known as ligands, having −OMe and −SePh as the ortho substituent attached to the aniline moiety of the parent 2-anilino-4,6-di-tert-butylphenol ligand, were synthesized. The ligands reacted with CuCl2·2H2O in a 2:1 ratio in CH3CN in the presence of Et3N and provided the corresponding mononuclear Cu(II)-diradical complexes 1 (−OMe) and 2 (−SePh). Complex 1 was square planar, while
合成了两个有机部分,称为配体,具有-OMe和-SePh作为与母体2-anilino-4,6-二叔丁基苯酚配体的苯胺部分连接的邻位取代基。配体与反应的CuCl 2 ·2H 2 ö以2:1的比例在CH 3中的的Et存在下CN 3 N和设置在相应的单核铜(II)配合物-diradical 1(-OMe)和2(-SePh) 。配合物1为方形平面,而配合物2由于Se原子和中心Cu(II)中心之间的次要配位,其正方形正方形的几何形状发生了畸变。两种配合物均由多顺磁性中心组成,并表现出通过可变温度磁化率测量确定的S t = 1/2基态。X波段电子顺磁共振测量表明,在配合物1的Cu(II)中心和在配合物2的配体中心(π自由基)存在不成对的电子。发现次级相互作用的程度取决于属于邻位取代基的供体原子的“柔软度”。