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The Solution structure of bis(acetylacetonato)oxovanadium(IV)

Garribba, Eugenio and Micera, Giovanni and Sanna, Daniele (2006) The Solution structure of bis(acetylacetonato)oxovanadium(IV). Inorganica Chimica Acta, Vol. 359 (14), p. 4470-4476. ISSN 0020-1693. Article.

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DOI: 10.1016/j.ica.2006.05.028


The behaviour of the bis-chelated oxovanadium(IV) complexes formed by acetylacetone (acac) and five of its derivatives was re-examined through a combination of spectroscopic methods in different solvents. It has been found that the complexes are penta-coordinated with a geometry close to the square pyramid and maintain in solution the same structure as in the solid state. The results rule out a cis–trans isomerism of the species VOL2S (L = acac or derivative, S = solvent) in solution. Depending on the coordinating ability of the solvent a sixth molecule can be bound, more or less strongly, to the free axial position of the complexes. The combined application of the electronic absorption and IR spectroscopies allows to establish if the complexes in solution are penta- or hexa-coordinated.

Item Type:Article
ID Code:1474
Uncontrolled Keywords:Oxovanadium(IV), EPR spectroscopy, acetylacetone, solution structure, Cis–trans isomerism
Subjects:Area 03 - Scienze chimiche > CHIM/03 Chimica generale e inorganica
Divisions:001 Università di Sassari > 01 Dipartimenti > Chimica
002 Altri enti e centri di ricerca del Nord Sardegna > CNR-Consiglio Nazionale delle Ricerche > Istituto di chimica biomolecolare, Sassari
Additional Information:Pubblicato online il 7 giugno 2006.
Deposited On:18 Aug 2009 10:05

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