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Amino acid-lanthanide interactions. Crystal structures of lanthanide complexes of Alpha-amino isobutyric acid (Aib), [La2(Aib)4(H2O)8](ClO4)6 and [Pr2(Aib)4(H2O)8]Cl6·H2O

Aparna, K and Krishnamurthy, SS and Nethaji, M and Balaram, P (1994) Amino acid-lanthanide interactions. Crystal structures of lanthanide complexes of Alpha-amino isobutyric acid (Aib), [La2(Aib)4(H2O)8](ClO4)6 and [Pr2(Aib)4(H2O)8]Cl6·H2O. In: Polyhedron, 13 (21). pp. 2993-2997.

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Abstract

The structures of [La2(Aib)4(H2O)8](ClO4)6 (1) and [Pr2(Aib)4(H2O)8]Cl6·H2O (2) have been determined by X-ray crystallography and show that the two lanthanide cations are bridged by carboxyl groups of our Aib molecules and are surrounded by four oxygen atoms from water molecules thus making the coordination number 8. The geometry around the lanthanum ion in 1 is a distorted bicapped trigonal prism whereas the praseodymium ion in 2 exhibits a square antiprismatic arrangement of the ligands. Coordination mode of Aib is compared with that in other metal

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science Ltd.
Keywords: lanthanide;amino acid;ligands;x ray crystallography
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Division of Biological Sciences > Molecular Biophysics Unit
Date Deposited: 29 Jun 2004
Last Modified: 19 Sep 2010 04:12
URI: http://eprints.iisc.ernet.in/id/eprint/433

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