Infrared Spectroscopic and Theoretical Studieson Cobalt ( Ⅱ ) Complex of Maleinitriledithiolate and 4, 4f-Dimethyl-2, 2'-bipyridine

The complete experimental IR spectra and vibrational analysis of the title complex Co(mnt)(dmbpy) were reported in this paper. The results show that the complex molecule has a planar geometrybelonging to point group C2v and ground electronic state with spin quartet. A new method for analyzing vi-brational spectra of complicated molecule is established. The essential of this method is to point out mainfixed points and pivotal vibrational units in assignment for each fundamental band. Two new symbols q(heaving along the specified direction) and M (midpoint of a bond or unit) were defined for describing thevibrational modes accurately.