Oxygen and vanadium exchange processes in linear vanadate oligomers
UNSPECIFIED (1996) Oxygen and vanadium exchange processes in linear vanadate oligomers. JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS (16). pp. 3357-3361. ISSN 0300-9246Full text not available from this repository.
The existence of the linear tri- and tetra-vanadate anions in aqueous solutionhas been confirmed by V-51 and O-17 NMR and potentiometry, yielding the formation constants. Their resonances are mostly broadened by an exchange process which is shown by the linewidths and by magnetisation-transfer experiments to be independent of the monomeric or the dimeric vanadates also present, and also of the solvent oxygens. The broadenings are not consistent with a simple process of exchange, but instead reveal the presence of an intermediate, probably cyclic, having a short but not insignificant lifetime. Also, simple proton transfer between the oxygens in the aqueous monoprotonated monovanadate anion is sufficiently slow to be detectable by NMR spectroscopy.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS|
|Publisher:||ROYAL SOC CHEMISTRY|
|Date:||21 August 1996|
|Number of Pages:||5|
|Page Range:||pp. 3357-3361|
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