Intramolecular Metalation of C[BOND]H Bonds with {cis,cis-1,3,5-Tris[(diphenylphosphino)methyl]cyclohexane}rhodium(I) Chloride

Authors

  • Hermann August Mayer,

    Corresponding author
    1. Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-7400 Tübingen 1
    • Institut für Anorganische Chemie der Universität Tübingen, Auf der Morgenstelle 18, D-7400 Tübingen 1
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  • William Charles Kaska

    1. University of California Santa Barbara, Santa Barbara, California 93106, USA
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Abstract

The novel tridentate ligand cis,cis-1,3,5-tris[(diphenylphosphino)methyl]cyclohexane (6) has been synthesized and treated with [Rh(COD)Cl]2. Intramolecular metalation of a C[BOND]H bond of the cyclohexane ring occurs (7). Studies with D2 gas and 6[D6] prove that axial and equatorial C[BOND]H bonds are metalated and that a mutual exchange occurs in this process. Replacement of the Cl by the SbF6 anion in 7 results in a reduced interaction between the metal and the C[BOND]H bond (8). 7 reacts with CO to form the carbonyl 9 where no such interaction is observed.

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