Jump to main content
Jump to site search

Issue 8, 1986
Previous Article Next Article

The mechanism of hydrogenation by aqueous chromium(II) ion of the carbon–carbon double bond of olefinic compounds with polar substituents

Abstract

The kinetics of the reaction of Cr2+ with maleic acid, fumaric acid, methylmaleic acid, chloromaleic acid, dichloromaleic acid, and methylfumaric acid have been investigated over a wide range of chloromaleic > maleic ≃ methylmaleic > dichloromaleic > fumaric and maleic > dichloromaleic ≃ ligand is in excess. In excess of Cr2+ the rate law is as shown below and k3 follows the trend: Rate =k3[Cr2+]2[L] chloromaleic > maleic > dichloromaleic > methylmaleic > methylfumaric. With excess ligand, L, the rate law has two terms (below) and the two rate constants, k3 and k2 follow the order: Rate =k2[Cr2+][L]+k3[Cr2+][L]2 chloromaleic > maleic ≃ methylmaleic > dichloromaleic > fumaric and maleic > dichloromaleic ≃ methylmaleic > chloromaleic respectively. The kinetic data are supplemented by stoicheiometric data, by determinations of product distribution, and by spectroscopic data, and they are discussed in terms of a model involving at least partial attack by Cr2+ directly on the C[double bond, length half m-dash]C double bonds.

Back to tab navigation

Article type: Paper
DOI: 10.1039/DT9860001491
Citation: J. Chem. Soc., Dalton Trans., 1986,0, 1491-1497
  •   Request permissions

    The mechanism of hydrogenation by aqueous chromium(II) ion of the carbon–carbon double bond of olefinic compounds with polar substituents

    D. Katakis, E. Vrachnou-Astra and J. Konstantatos, J. Chem. Soc., Dalton Trans., 1986, 0, 1491
    DOI: 10.1039/DT9860001491

Search articles by author

Spotlight

Advertisements