On the magnetic and optical behaviours of CoCs3Cl5

Abstract

Abstract A discussion of the behaviour of CoCs 3 Cl 5 , a tetrahedral complex of Co 2+ is given, which consists of the assignment of fine structure in absorption spectra and explanation of e.p.r. as well as magnetic mean susceptibility and anisotropy results. The same set of values for the involved theoretical parameters has been seen to give reasonably good fit with all these experimental results. There is evidence of the change of anisotropic field parameters with temperature, though the calculation of this has not been attempted for uniqueness of fittings. There occur a reduction in Racah parameter B from its free ion value, and an anisotropic orbital reduction factor, which indicate an appreciable anisotropic covalency overlap between the d-charge clouds of Co 2+ with the surrounding s- and p- charge clouds of chlorine.