Chelation of manganese(II) with quinaldic acids. An NMR relaxation study |
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| Authors: | Christina Moberg Michael Weber |
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| Institution: | Royal Institute of Technology, Department and Organic Chemistry, S-100 44 Stockholm, Sweden |
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| Abstract: | Manganese(II) enhanced spin-lattice relaxation rates (1/T1p) of 1H and 13C nuclei in quinoline-2-carboxylic acid, 8-methoxyquinoline-2-carboxylic acid, 8-hydroxyquinoline-2-carboxylic acid, 8-aminoquinoline-2-carboxylic acid, and 6-(hydroxymethyl)pyridine-2-carboxylic acid were measured in aqueous solution at various temperatures. Relative metal-nucleus distances were calculated from the r?6 dependence of 1/T1p. The results indicate that the Mn2+ ion in the 8-methoxyquinaldic acid chelate is coordinated to the carboxyl oxygen atom and the nitrogen atom but not t the methoxyl oxygen atom. |
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| Keywords: | Author to whom correspondence should be addressed |
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