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Kinetics and mechanisms of substitution reactions with sulphur-containing nucleophiles in aqueous acid solutions. II. Rates of reactions of some tetrahalopalladate(II) anions with some N-alkyl substituted thioureas

✍ Scribed by P.van Z. Bekker

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 693 KB
Volume: 31
Category: Article
ISSN: 0020-1693
DOI: 10.1016/s0020-1693(00)94987-9

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✦ Synopsis

The rates and activation energy parameters of halide ligand substitution in PdXf (X = Cl-, Br-), with N-alkyl substituted thioureas in aqueous halo acid solutions have been determined for the first kinetically distinguishable step. Ligand and product composition is substantiated by analytical data. Low enthalpies and an appreciably negative entropy of activation accompany high rates of reaction.

The rate law in each case is kobs = k /L], where L = N-alkylsubstituted thioureas and k, the &and dependent rate constant at 25 "C

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Kinetics and mechanisms of substitution

Kinetics and mechanisms of substitution reactions with sulfur-containing nucleophiles in aqueous acid solutions. I—rates of reactions of some tetrahalopalladate (II) anions with thiourea and selenourea

✍ P. Van Z. Bekker; W. Robb 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 545 KB

## Abstract The activation energy parameters for the reaction of PdX (X=Cl^−^, Br^−^) in aqueous halide acid solution with thiourea (tu) and selenourea (seu) have been determined. High rates of reaction parallel low enthalpies and appreciable negative entropy of activation. The rate law in each cas