Summary.
[PdCl(terpy)]Clċ3H2O has been synthesized both by interaction of [PdCl4]2− and cis-[Pd(DMSO)2Cl2] with terpy (2,2′:6′,2′′-terpyridine). Complex formation of [PdCl(terpy)]+ with L-cysteine, S-methyl-L-cysteine, and L-methionine was studied as a function of temperature (298–308 K) using of stopped-flow spectrophotometry in methanol-water (95:5 (v/v)). The ionic strength and acidity of the solutions were adjusted to 0.10 molċdm−3 with CH3SO3H. The second-order rate constant for the reaction of [PdCl (terpy)]+ with L-cysteine amounts to 9.60±0.5 M −1s−1. L-Methionine and S-methyl-L-cysteine are unreactive under the same experimental conditions. The entropy of activation is strongly negative, which is compatible with an associative mechanism.
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Received February 14, 2000. Accepted (revised) April 10, 2000
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Karkali, R., Bugari, D. Synthesis and Reactivity of [PdCl(terpy)]Cl. Monatshefte fuer Chemie 131, 819–824 (2000). https://doi.org/10.1007/s007060070059
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DOI: https://doi.org/10.1007/s007060070059