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DOI: 10.1039/A708402A (Paper) Reference Section for: J. Chem. Soc., Dalton Trans., 1998, 1021-1024

Ion-pairing and charge-transfer interactions between octacyano-molybdates(IV) and -tungstates(IV) and diquaternary bipyridines

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Beata Nowicka and Alina Samotus

Abstract

New salts of formula [pq]2[M(CN)8] [M = Mo or W, pq = paraquat (1,1′-dimethyl-4,4′-bipyridinediium)] have been synthesized. The systems {A2+, M(CN)84–} where A2+ = pq or dq (diquat, 6,7-dihydrodipyrido[1,2-a∶2′,1′-c]pyrazinediium), which show optical electron transfer from anion to cation, were studied. The first association constants in aqueous solution were determined spectroscopically and the properties of the ion-pair charge-transfer bands were used for calculation of the thermodynamic parameters of the electron transfer and construction of potential-energy curves on the basis of the Hush model.

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