In this paper the synthesis and the characterization of two complexes of copper and 2,2'-bipyridyl with amino acids 4-aminohippuric acid and L-proline are reported. The X-ray structure reveals for the first complex, [Cu-2(OH)(OH2)(bipy)(2)(Am-hip)](NO3)(2). 4H(2)O, dinuclear copper(II) cations with nitrate counterions and lattice water molecules. The two metal centres are linked together by a water molecule, a hydroxyl group and the carboxylic moiety of the 4-amino-hippuric acid, the remaining two positions on both metal centres are occupied by bipyridyl molecules. The second compound consists of monomeric [Cu(OH2)(bipy)(L-pro)](+) cations and perchlorate anions. Also in this case copper is five-coordinated in a distorted square pyramidal geometry with the bipyridine nitrogens, one carboxylate oxygen atom and the amino nitrogen of the L-proline ion on the basal plane.
Synthesis, X-ray structures and characterization of copper(II)-2,2'-bipyridyl derivatives of (4-amino)-hippuric acid and of L-proline / SGARABOTTO P.; BISCEGLIE F.; PELOSI G.; ABDEL-RAHMAN L.. - In: POLYHEDRON. - ISSN 0277-5387. - 18:19(1999), pp. 2505-2510. [10.1016/S0277-5387(99)00162-X]
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