Concerted reductive coupling of an alkyl chloride at Pt(IV) |
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Authors: | Crosby Sarah H Thomas Helen R Clarkson Guy J Rourke Jonathan P |
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Affiliation: | Department of Chemistry, University of Warwick, Coventry, UK CV4 7AL. |
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Abstract: | Oxidation of a doubly cyclometallated platinum(II) complex results in two isomeric platinum(IV) complexes. Whereas the trans isomer is robust, being manipulable in air at room temperature, the cis isomer decomposes at -20 °C and above. Reductive coupling of an alkyl chloride at the cis isomer gives a new species which can be reoxidised. The independence of this coupling on additional halide rules out the reverse of an S(N)2 reaction, leaving a concerted process as the only sensible reaction pathway. |
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