EPR Study of Covalent Bond in Transition Metal Complexes

The results of a study of a covalent bond in the anitibonding and bonding states of d¹ and d⁹ complexes obtained by analyzing the EPR and optical data are presented. The nature of the electron density delocalization in some of the complexes is discussed. The effect of the charge-transfer states on the covalent bond structure is considered. The vibronic effect on the ground state function is discussed. The electronic distributions determined from EPR spectra by different approximation methods are compared.