The influence of the overlapping term on the valence mol. orbitals of transition-metal complexes is studied with the assistance of improved MS-X method. Based on Xa multiple scattering one-electron wave functions, a way for solving the many-electron Schroedinger equation by means of irreducible tensor is reported. As the application, the anal. of the spectra of transition-metal complexes Cr(ON)63-, Co(CN)63-, CoF63- are presented. The results show that the overlapping term is necessary for the calculation of the spectra of transition-metal complexes.

Key words: OXIDE, COBALT COMPLEX, IRREDUABLE REPRESENTATION, EMISSION SPECTRA, CHROMIUM COMPLEX, SELF-CONSISTENT-FIELD SCATTERED X\A\ METHOD