Semiempirical NDDO/MC calculations of the excited states of the chromate ion

A new semiempirical method of calculating the excited states of transition metal complexes is developed. This technique uses the configuration interac tion and semiempirical NDDO/MC methods to obtain the ground state of a set of Slater type valence spd-orbitals chosen from the optical spectra of tran sition metals together with the corresponding core integrals. The method is tested in calculations of the electronically excited states of the chromat e ion. Good agreement with the experimental energies of vertical transition s and the results of ab initio calculations is achieved.