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cis/trans Isomerization of Phosphinesulfonate Palladium(II) Complexes

Authors

  • Dr. Matthew P. Conley,

    1. Department of Chemistry, The University of Chicago, Chicago, IL 60637 (USA), Fax: (+1) 773-702-0805
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  • Prof. Dr. Richard F. Jordan

    Corresponding author
    1. Department of Chemistry, The University of Chicago, Chicago, IL 60637 (USA), Fax: (+1) 773-702-0805
    • Department of Chemistry, The University of Chicago, Chicago, IL 60637 (USA), Fax: (+1) 773-702-0805
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  • This work was supported by the U.S. Department of Energy (DE-FG-02-00ER15036).

Abstract

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With a little help from a friend: Chain growth in olefin polymerization by [{PO}PdR] catalysts is believed to occur by unimolecular cis-P,R- to trans-P,R-[{PO}PdR(olefin)] isomerization, with subsequent insertion. Studies with [{PO}Pd(py)2]+ (py=pyridine) and non-equilibrium cis/trans mixtures of [{PO}PdClP(O-o-tolyl)3] indicate that an external ligand is necessary for cis/trans isomerization of {PO}Pd complexes (see scheme). {PO}=2-Phosphinosulfonate.

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