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Kinetic and spectroscopic studies of the substitution reactions of [Rh(acac)(CO)2] with triphenylphosphite

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Summary

The substitution reactions of [Rh(acac)(CO)2] with triphenylphosphite (P) to produce [Rh(acac)(CO)P], [Rh(acac)P2] and [PhP3P′], were studied in detail using spectroscopic (n.m.r., i.r. and u.v.-vis.) and kinetic techniques. The kinetic data demonstrate that the first substitution process is very fast and followed by the rate-determining second step. The subsequent loss of acac is relatively slow. The activation enthalpy for the formation of [Rh(acac)P2] is extremely low and possibly accounts for the catalytic nature of this system in hydrogenation and hydroformylation reactions.

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Authors and Affiliations

  1. Institute for Physical Chemistry, University of Frankfurt, Niederurseler Hang, 6000, Frankfurt/Main, FRG

    R. van Eldik, S. Aygen & H. Kelm

  2. Institute of Chemistry, University of Wroclaw, 14, Joliot-Curie St., 50-383, Wroclaw, Poland

    A. M. Trzeciak & J. J. Ziólkowski

Authors
  1. R. van Eldik
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  2. S. Aygen
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  3. H. Kelm
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  4. A. M. Trzeciak
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  5. J. J. Ziólkowski
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van Eldik, R., Aygen, S., Kelm, H. et al. Kinetic and spectroscopic studies of the substitution reactions of [Rh(acac)(CO)2] with triphenylphosphite. Transition Met Chem 10, 167–171 (1985). https://doi.org/10.1007/BF00620664

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  • DOI: https://doi.org/10.1007/BF00620664

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