Author:
Barnabas A. Freddy,Sallin Dominique,James Brian R.
Abstract
Kinetic and low temperature nmr data are presented for the reaction of hydrogen sulfide with Pd2X2(μ-dpm)2 species in dichloromethane solution (X = halide, dpm = bis(diphenylphosphino)methane. The reactions form the corresponding bridged-sulfide, A-frame complex via oxidative-addition of H2S across the Pd—Pd bond to give a hydrido(mercapto) intermediate, that subsequently liberates H2 to give Pd2X2(μ-S) (μ-dpm)2 species. Quantitative kinetic data showing first order behaviour in both Pd2 dimer and H2S concentrations are given for the bromide system over the temperature range 0–35 °C, as well as more limited data for the photosensitive iodide system; plausible mechanisms are discussed. Some qualitative findings are presented for related systems containing 1, 1-bis(diphenylphosphino)ethane. Keywords: palladium complexes, hydrogen sulfide, bis(diphenylphosphino)methane.
Publisher
Canadian Science Publishing
Subject
Organic Chemistry,General Chemistry,Catalysis
Cited by
29 articles.
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