Zwitterionic Stabilization of a Reactive Cobalt Tris-Isocyanide Monoanion by Cation Coordination

Authors

  • Alex E. Carpenter,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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    • These authors contributed equally to this work.

  • Grant W. Margulieux,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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    • These authors contributed equally to this work.

  • Matthew D. Millard,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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  • Dr. Curtis E. Moore,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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  • Dr. Nils Weidemann,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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  • Prof. Dr. Arnold L. Rheingold,

    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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  • Prof. Dr. Joshua S. Figueroa

    Corresponding author
    1. Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
    • Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, MC 0358, La Jolla, CA 92093 (USA)
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  • We are grateful to the U. S. National Science Foundation for finanical support (grant number CHE-0954710). J.S.F. is a Cottrell Scholar of Research Corporation and an Alfred P. Sloan Research Fellow (2011–2012). Professors John D. Protasiewicz and Charles L. Perrin are acknowledged for helpful discussions.

Abstract

original image

A break with tradition: The cation, [Ph3P[DOUBLE BOND]N[DOUBLE BOND]PPh3]+ ([PPN]+), was found to provide a stabilizing η2-arene interaction to the coordinatively unsaturated, tris-isocyanide monoanion, [Co(CNArMes2)3](ArMes2=2,6-(2,4,6-Me3C6H2)C6H3); Co=purple, N=light purple, and P=orange). The resulting zwitterion is a source of [Co(CNArMes2)3] anions, performing nucleophilic additions, carbon–element bond activations, and multistep decarbonylations.

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