Absorption spectra of chromium (III), rhodium (III) and iridium (III) diethyldiselenophosphates

Abstract

The inner complexes of dsep⁻=(C₂H₅O)₂PSe⁻ ₂ have been prepared, involving an octahedral environment of six selenium atoms with a small trigonal distortion. The symmetry types of the M.O. formed with the corresponding symmetry D ₃ are indicated. The very low value of the nephelauxetic ratio β ₃₅ and the moderate value of β ₅₅ in Cr dsep₃ are discussed. The electron transfer bands observed are related to the concept of optical electronegativities.