Naslov
Kinetics and Mechanism of Complexation of Vanadium(V) with Acetohydroxamic acid in Acidic Media

Autori
Gabričević, M ; Weitner, T ;

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
European Colloquium on Inorganic Reaction Mechanisms

Mjesto i datum
Debrecen, Mađarska, 11.06.2013. - 15.06.2013

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
Vanadium; Acetohydroxamic Acid; Mechanism

Sažetak
Octahedral V(V) in di-oxo form cis-VO2+ efficiently binds hydroxamic acids in acidic media.(ref). Reaction proceeds in a two steps. The first one is complexation reaction where hydroxamic acid as bidentate ligand forms 5-member ring with V(V) while the second one is redox reaction where vanadyl ion (VO2+) is formed (eq. 1). Hydroxamic acids are week organic acids which releases one H+ ion per group during the complexation. In reactions with two investigated hydroxamic acids (Hydroxyurea and Acetohydroxamic acid) we observed unusual increase of complex stability in acidic media which is opposite to complexes with other metals like Fe(III) or Cu(II) where acidity decreases stability of complexes.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA