Structural, motional, and kinetic features of the Cu(II)-(L-His)2 complex in aqueous solution |
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Authors: | G Valensin R Basosi W E Antholine E Gaggelli |
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Affiliation: | Department of Chemistry, University of Siena, Siena, Italy;Department of Radiology and Biochemistry, Medical College of Wissconsin, Milwaukee, USA;Department of Chemistry, University of Siena, Siena, Italy |
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Abstract: | A careful analysis by 1H and 13C FT-NMR on the Cu(II) (L-histidine)2 complex was carried out which allows delineation of structure and dynamics in solution. A mixture of complexes was shown such that 24% of the Cu(II) (L-histidine)2 complex contains both histidines bound in the histaminelike way, while the remaining 76% contains one L-His molecule bound in the histaminelike way and the other L-His molecule bound in the glycinelike way. The motional correlation time and relevant features of the exchange process were also delineated. |
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Keywords: | Address reprint requests to Professor G. Valestin Dipartimento di Chimica Universita di Siena (Fondata nel 1240) Pian dei Mantellini 44–53100 Siena Italy. |
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