Difluoride dioxides of molybdenum(VI) and tungsten(VI)

Abstract

¹⁹ F N.m.r. and i.r. spectroscopy, mass spectrometry, and chemical analysis show that MoO₂F₂ is the main product of reaction of MoO₂Cl₂ with anhydrous HF at elevated temperature and pressure or XeF₂ at low temperature, evidence for MoO₂ClF also being obtained in the MoO₂Cl₂–XeF₂ reactions; controlled hydrolysis of WOF₄ gives WO₂F₂, and reaction of the difluoride dioxides with XeF₂ gives XeF₂·MoOF₄ and XeF₂·WOF₄.