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Substitution of phosphine in the complex [RhCl(cyclooctadiene)(phosphine)] by 1-hexene

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The substitution of phosphine in the [RhCl(COD)(phosphine)] complex (1), where phosphine is PPh3 or 1/2 BPS-2 [bis(diphenylphosphinoethyl)tetramethyldisiloxane] and COD is cycloocta-1,5-diene, by 1-hexene is a two-step reversible reaction. All individual rate constants and equilibrium constants were determined spectrophotometrically and associative mechanism occurring via the formation of five-coordinated [RhCl(COD)(phosphine)(1-hexene)] (2) was inferred. The rate-determining step changes from the first- to the second-one as the concentration of 1-hexene increases. An excess of phosphine shifts the equilibrium towards complex (2).

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Authors and Affiliations

  1. Laboratory of Organometallic Chemistry; Faculty of Chemistry, A. Mickiewicz University, 60-780, Poznań, Poland

    Wojciech Duczmal, Bogdan Marciniec & Elżbieta Śliwinska

Authors
  1. Wojciech Duczmal
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  2. Bogdan Marciniec
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  3. Elżbieta Śliwinska
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Duczmal, W., Marciniec, B. & Śliwinska, E. Substitution of phosphine in the complex [RhCl(cyclooctadiene)(phosphine)] by 1-hexene. Transition Met Chem 14, 105–109 (1989). https://doi.org/10.1007/BF01040601

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  • DOI: https://doi.org/10.1007/BF01040601

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