Reactions of tungsten hexafluoride with alkylalkoxy- and alkylphenoxy-silanes, hexamethyldisiloxane, and dimethyl ether

Abstract

The preparation of a series of methoxy- and phenoxy-tungsten(VI) fluorides WF_6–n(OR)_n(Me, n= 1–4; Ph, n= 1 or 2), is described. ¹⁹F N.m.r. spectra of the compounds indicate that they are monomeric in solution and that in some cases geometric isomers exist. Tungsten hexafluoride reacts with hexamethyldisiloxane and dimethyl ether to give tetrafluoro-oxotungsten(VI) and a 1 : 1 tetrafluoro-oxotungsten(VI)–dimethyl ether complex respectively; the latter compound is also formed by the decomposition of cis-WF₄(OMe)₂ and its spectra suggest that it is monomeric.