Ruthenium complexes of pyridine oxime and azoimine ligands: Syntheses, crystallography, electrochemical and catalytic properties

摘要

Five mononuclear ruthenium complexes of the type trans- [RuCl2(Azo)(Py-C(R)N = OH)] (C1-C5) {Azo = C6H5N = NC(COCH3) = NC6H4X, R = CH3, X = H (C1), Br (C2), CH3 (C3), F (C4); R = H, X = CH3 (C5)} have been synthesised and characterized by spectroscopic (IR, UV-Vis, and NMR) and electrochemical (cyclic voltammetry) techniques. In addition, C2 complex has been further characterized by single crystal X-ray diffraction. The complexes (C1-C3) were also tested with respect to their catalytic activity in the liquid-phase hydrogenation of acetophenone. The electronic absorption spectrum of C2 in acetonitrile has been modelled by time-dependent density functional theory.