THE r1-r1 INTRACONFIGURATIONAL ELECTRONIC TRANSITION WITHIN t2g4 OF THE CHLORO–BROMO MIXED HALOGENO COMPLEXES OF Os(IV)

The electronic spectra of the chloro–bromo mixed halogeno complex anions, [OsBrxCl6−x]2− (x=0–6), in K2SnCl6 matrix were measured in the region of 16000–18000 cm−1. In this region, intraconfigurational electronic transition within t2g4 was observed in the absorption and emission measurements. The mixed halogeno complex anions showed band features markedly different from those of the complexes in Oh symmetry.