Spectroscopic studies on matrix isolated osmium pentafluoride oxide, osmium tetrafluoride oxide, and osmium difluoride trioxide

Abstract

The title compounds OsOF₅, OsOF₄, and OsO₃F₂ have been isolated as monomeric species in inertgas matrices at low temperatures, and studied by i.r. and u.v.–visible spectroscopy. In particular, the electronic spectra of these three molecules are described for the first time, and the principal charge-transfer bands assigned. The i.r. spectrum of molecular OsOF₄ is also reported for the first time, and shows prominent absorptions at ca. 1 079 (OsO) and ca. 685 cm^–1(Os–F) consistent with C_4v geometry.