Effect of the basicity of the medium on the products of the stepwise hydrolysis of tungsten hexafluoride

The aim of this paper is to present stepwise hydrolysis of tungsten hexafluoride by means of F-19-NMR. The F-19-NMR spectral parameters of the hydrolysis products of tungsten hexafluoride in acetonitrile are presented. The authors demonstrate how the introduction of amine at the stages of extensive hydrolysis, when hydrogen fluoride and molybdenum or tungsten complexes with low fluorine content coexist in solution, leads to the formation of tetrafluoro complexes as the major products.