Abstract

Abstract Phosphorus trifluoride oxide readily replaces two fluorine ligands in IF 7 for a doubly bonded oxygen atom, thereby providing a new and convenient synthesis for IF 5 O. Attempts to extend this method to the syntheses of either IF 3 O 2 or IFO 3 were unsuccessful due to competing deoxygenation reactions of the iodine oxyfluoride precursors. Furthermore, PF 3 O does not undergo fluorine-oxygen exchange with the NF 4 + cation.

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