Abstract
Xenon difluoride has been shown to be a fluoride ion donor. With bromine pentafluoride as solvent, a series of compounds of general formula 2XeF2,MF5(M = As, Ru, Os, Ir, Pt), XeF2,MF5(M = As, Ru, Os, Ir, Pt), and XeF2,2MF5(M = Ru, Ir, Pt) have been prepared. The noble-metal compounds in each series are isomorphous. Raman and i.r. spectroscopy have established that the noble-metal compounds, 2XeF2,MF5 contain the same cation as the fluoroarsenate, [Xe2F3]+[AsF6]–, the ionic formulation of which has been established by X-ray single-crystal analysis. The Raman spectra of the 1 : 1 compounds are similar to those of related, established salts, A+[MF6]–. Departures from the ideal salt spectra suggest that the [MF6]– symmetry is lowered by fluorine bonding of the anion with the cation: F–Xe+⋯ F–PtF5–.
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