cis-Dioxo- and trioxo-complexes

Abstract

Raman and infrared spectra have been measured of a number of transition-metal complexes of the form [MO2X4]n–(M = MoVI, WVI, or VV; X = F, Cl, or ½ Ox), and a cis configuration of the oxygen ligands has been found for these d0-species. The results are compared with those obtained for trans-dioxo-complexes and the dífferences explained in terms of the oxygen–metal bonding involved. The vibrational spectra of a number of trioxo-species and some polymeric oxyfluorides have also been measured.