Abstract
In the reaction of V2O5 with aqueous or alcoholic solutions of tetraalkylammoniumhydroxide the orange decavanadates (NR4)3H3V10O28, (NR4)4H2V10O28, (NR4)5HV10O28 (NR4)6V10O28 and colourless metavanadates can be obtained. The tetrabutylammoniumsalt [N(C4H9)4]3HV4O12 is the first known metavanadate with discrete polyanion. Its molecular weight was determined by vapor pressure osmometry in chloroform. The Raman spectrum is identical with the spectrum of a sodium metavanadate solution. The vibration spectra of the compounds are discussed and partial assignments were made.
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