Ultraviolet–visible spectroscopic studies on manganese and rhenium oxide fluorides in low-temperature matrices

Abstract

Five high-oxidation-state metal oxide fluorides, MnO₃F, ReO₃F, ReO₂F₃, ReOF₅ and ReOF₄ have been isolated as molecular species in inert-gas matrices at low temperatures, and studied by IR and UV/VIS spectroscopy. In particular, the electronic spectra are described and the principal charge-transfer bands assigned using the optical electronegativity model. This suggested that a new value for χ_opt(F^–) of 3.6 is appropriate for transition-metal oxide fluorides.