Mixed Valence Compounds of Vanadium II. Properties and Formation Mechanism

Abstract
A second mixed valence compound of vanadium was obtained by decomposition of vanadyl (IV)bis (acetylacetonate) by fluoride ions in a nonpolar solvent. The compound has the formula [(C2H5)4N]4[V10O26F2H2] i.e. two oxygens of the previous compound [(C2H5)4N]4[V10O28H4] were replaced by fluoride ions. The thermal stability, electronic and ESR spectra are described. The properties of this compound are very similar to the compound obtained by addition of a halide ion (chloride, bromide or iodide) to vanadyl(IV) bis (acetylacetonate) in the presence of another metal complex. The mechanism of formation of these compounds is discussed.

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