Synthesis, structure, catalytic transfer hydrogenation and biological activity of cyclometallated ruthenium(III)2-(arylazo)phenolate complexes
作者:G. Venkatachalam、R. Ramesh、S.M. Mobin
DOI:10.1016/j.jorganchem.2005.05.039
日期:2005.9
spectrum of the complex 7 in dichloromethane at 77 K shows rhombic distortion around the ruthenium ion. The structural conformation of the complex 1 has been carried out by X-ray crystallography. The redox behavior of the complexes has been investigated by cyclic voltammetry and the potentials are observed with respect to the electronic nature of substituents (R) in the 2-(arylazo) phenolate ligands
由五个2-(芳基偶氮)的反应合成了一系列[RuX(PPh 3)2(L)]类型的单核有机钌配合物(X = Cl或Br; L = 2-(芳基偶氮)酚盐配体)。钌(III)前体的苯酚配体,即。[RuCl 3(PPh 3)3 ]和[RuBr 3(PPh 3)2(CH 3OH)]在苯中回流。在所有这些反应中,2-(芳基偶氮)酚盐配体从前体中取代了一个三苯基膦分子,两个氯化物或溴化物和一种甲醇,从而形成五元环金属化物质。2-(芳基偶氮)苯酚配体表现为双阴离子三齿C,N,O供体,并通过在苯环邻位的酚质子和苯基质子解离而与钌配位。通过元素分析,磁化率测量,FT-IR,UV-Vis和EPR光谱数据确定了复合物的组成。这些络合物是顺磁性的,在氯仿中表现出强烈的d-d和电荷转移跃迁。配合物7的溶液EPR光谱在77 K的二氯甲烷中,钌离子周围出现菱形畸变。配合物1的结构构象已经通过X射线晶体学进行。已经通过循环伏