Tetrachloro-oxo-osmium(VI): a new synthesis, and matrix-isolation infrared and ultraviolet–visible studies

Abstract

Pure samples of OsOCl₄ have been prepared by a new synthetic route involving OsO₄ and BCl₃. The i.r. spectrum in low-temperature matrices has been obtained, and exhibits characteristic bands at 1 032 and 395 cm^–1. These are assigned as ν_A1(OsO) and ν_E(Os–Cl) in a C_4v model for monomeric OsOCl₄. The electronic spectrum has also been recorded under similar conditions, and tentative assignments proposed for the most intense absorptions.