Stereo-Selectivity and Hindrance in the Ligand-Exchange of the Complex, [(CyS)Cu(II)(H−1X-Gly)]2−, with Cysteine Diastereomers. X; L-Amino Acid Residues
Stopped-flow kinetic studies were carried out on the stereo-selectivity and hindrance in the ligand-exchange of the ternary complex, [(CyS)Cu(II)(H−1X-Gly)]2− with cysteine diastereomers, where X represented L-amino acid resudues. The rate of ligand-exchange with the D-diastereomer was approximately 1.7 fold faster than that of the L-diastereomer. The complexes with aspartyl, asparaginyl and threonyl residues were labile for the ligand-exchange.