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Medientyp:
E-Artikel
Titel:
Coordination‐site exchange and solid‐state 13C NMR studies of bis(oxalato)dioxovanadate(V) ion
Beteiligte:
Lee, Man‐Ho;
Schaumburg, Kjeld
Erschienen:
Wiley, 1991
Erschienen in:
Magnetic Resonance in Chemistry, 29 (1991) 9, Seite 865-869
Sprache:
Englisch
DOI:
10.1002/mrc.1260290902
ISSN:
0749-1581;
1097-458X
Entstehung:
Anmerkungen:
Beschreibung:
AbstractActivation parameters were determined for the exchange between the two types of carboxylate groups which are cis and trans to the VO bonds in the bis(oxalato)dioxovanadate(V) ion, [VO2(C2O4)2]3−. Kinetic data were obtained from the 13C NMR spectra at eleven temperatures between 268 and 306 K by the total line‐shape method. The coordination‐site exchange mechanism, involving chelate ring opening and closing in the ion, is proposed. The solid‐state 13C NMR spectra of the oxalato complexes, (NH4)3[VO2(C2O4)2]·2H2O and K3[VO2(C2O4)2]·3H2O, are also discussed in relation to the structures.