The Structures of Some 1:1 Adducts of Selenium Tetrafluoride

Abstract

<p> The addition compounds of selenium tetrafluoride with sulfur trioxide, boron trifluoride, and arsenic, antimony, bismuth, vanadium, niobium and tantalum pentafluorides have been prepared. These compounds have been studied in the solid state using X-ray powder diffraction, and infra-red and Raman spectroscopy; in the molten state using Raman spectroscopy, nuclear magnetic resonance spectroscopy, and conductimetric and viscosity measurements; and in solution using Raman spectroscopy, cryoscopy, conductivity and nuclear magnetic resonance spectroscopy.</p> <p> The compound SeF4SO3 has a fluorosulfate-bridged polymeric structure. The remaining compounds have fluorine-bridged structures, this interaction being the strongest in SeF4BF3 and SeF4VF5 and decreasing in the order SeF4NbF5 SeF4TaF5 SeF4AsF5 SeF4SbF5 SeF4BiF5.</p> <p> The characteristics of the SeF3+ group are discussed. The properties of fluorine bridging and various methods of detecting such interactions are also considered.</p>