Coordination‐site exchange and solid‐state  13 C NMR studies of bis(oxalato)dioxovanadate(V) ion | Zendy

Lee ManHo | Zendy; Schaumburg Kjeld | Zendy

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Coordination‐site exchange and solid‐state 13 C NMR studies of bis(oxalato)dioxovanadate(V) ion

Author(s) -

Lee ManHo,

Schaumburg Kjeld

Publication year - 1991

Publication title -

magnetic resonance in chemistry

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.483

H-Index - 72

eISSN - 1097-458X

pISSN - 0749-1581

DOI - 10.1002/mrc.1260290902

Subject(s) - chemistry , carboxylate , crystallography , nmr spectra database , ion , carbon 13 nmr , solid state nuclear magnetic resonance , chelation , stereochemistry , spectral line , inorganic chemistry , nuclear magnetic resonance , organic chemistry , physics , astronomy

Activation 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, [VO 2 (C 2 O 4 ) 2 ] 3− . Kinetic data were obtained from the 13 C 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 13 C NMR spectra of the oxalato complexes, (NH 4 ) 3 [VO 2 (C 2 O 4 ) 2 ]·2H 2 O and K 3 [VO 2 (C 2 O 4 ) 2 ]·3H 2O , are also discussed in relation to the structures.

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