Polyhedral rearrangements involving five- and six-coordinate carbon |
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| Authors: | MFrederick Hawthorne Kenneth P Callahan Richard J Wiersema |
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| Institution: | Department of Chemistry, University of California, Los Angeles, California 90024 U.S.A. |
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| Abstract: | Polyhedral carboranes and metallocarboranes characteristically contain C atoms having coordination numbers of 5 and 6 within the polyhedral surface. Thermal carbon and metal atom migration reactions are observed in these species and we here report results obtained with polyhedra containing 10, 11, 12 and 13 vertices. Thermodynamic activation parameters have been measured for several representative rearrangement reactions and their mechanistic significance is discussed. General rules which appear to govern carbon and metal atom migration reactions are advanced. |
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