Abstract
The interaction of the palladium(II) complex [Pd(Pip)Cl(H2O)] + , where Pip is piperazine, with the sulphur donor nucleophiles; L-methionine (L-Met), and thiourea (tu) was studied under pseudo-first-order conditions as a function of nucleophile concentration and temperature, using UV-Visible spectrophotometric and stopped-flow techniques. Two consecutive reaction steps were observed for the substitution process with L-methionine. For the substitution with thiourea, a third reaction step, the displacement of the labilized amine, as a result of the strong trans-effect of thiourea ligand was observed. 1HNMR spectroscopy was used to follow the substitution of the ligand by thiourea. The activation parameters for all reactions studied suggest an associative substitution mechanism. The interaction of the monoaquamonochloro-(piperazine) Palladium (II) complex [Pd(Pip)Cl(H2O)] + , where Pip is piperazine, with the sulphur donor nucleophiles; L-methionine (L-Met), and thiourea (tu) was studied under pseudo-first-order conditions as a function of nucleophile concentration and temperature, using UV-Visible spectrophotometric and stopped-flow techniques. Two consecutive reaction steps were observed for the substitution process with L- methionine. For the substitution with thiourea, three reaction steps were observed.
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