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Tris-tert-butylorthovanadate VO(OC 4 H 9 ) 3  undergoes reaction with monocarboxylic acids to yield monomeric VO(OC 4 H 9 )(RCOO) 2 ; no VO(OC 4 H 9 ) 2 (RCOO) or VO(RCOO) 3  could be isolated from the reaction mixture. Polymeric dioxovanadium(V)-monocarbox-ylates(VO 2 RCOO) n  are formed by thermolysis or partial hydrolysis of VO(OC 4 H 9 )(RCOO) 2 ; the reaction mechanism is studied and discussed. Syntheses of Ba[VO 2 (CH 3 COO) 3 ], Ba[VO 2 (C 2 H 5 COO) 3 ] and N(C 4 H 9 ) 4 [V 4 O 8 Br(CH 3 COO) 4 ] are described. All compounds obtained are characterized by IR and  1 H NMR spectroscopy as well as by chemical reactions. The carboxyl groups are mostly acting as bidentate ligands.

Reaktion des Orthovanadinsäure-tri-tert-butylesters mit Monocarbonsäuren / Reaction of Tris-tert-butylorthovanadate with Monocarboxylic Acids