Mixed complexes of cobalt(III) with phenanthroline and galactose or arabinose
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Parada Aliste, José
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Mixed complexes of cobalt(III) with phenanthroline and galactose or arabinose
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Mixed complexes of bis-phenanthroline cobalt(III) and α-D-galactose or β-D- or L-arabinose are identified in aqueous solution from their 1H NMR and circular dichroism (CD) spectra. Galactose forms only the Δ-complex, but D-arabinose gives preferentially Δ-, and L-arabinose preferentially Λ-complexes, consistent with structural optimization with PM3 (tm) parameters. The Λ-complex is formed initially from β-D-arabinose, but the Δ-complex is preferred thermodynamically. Examination of the absorption and CD spectra gives information on configuration at cobalt(III) and allows assignments of electronic transitions in Co(III) and the phenanthroline residues. © 2001 Elsevier Science Ltd. All rights reserved.
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URI: https://repositorio.uchile.cl/handle/2250/157458
DOI: 10.1016/S0277-5387(01)00826-9
ISSN: 02775387
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Polyhedron, Volumen 20, Issue 17, 2018, Pages 2223-2230
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