Accession Number : ADA010195

Title :   Chemistry of Monocarbon Metallocarboranes Including Polyhedral Rearrangements in Mixed-Metal Bimetallocarboranes.

Descriptive Note : Interim rept.,

Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF CHEMISTRY

Personal Author(s) : Salentine,Chris G. ; Hawthorne,M. Frederick

Report Date : 15 MAY 1975

Pagination or Media Count : 40

Abstract : The synthesis and characterization of four isomers of the mixed-metal bimetallocarborane (C5H5)2CoNiCB7H8 are reported. These species have been found to undergo novel thermal polyhedral rearrangements werein metal atoms migrate to adjacent polyhedral vertices and remain there, constituting the first example of a thermally stable metal-metal interaction in a metallocarborane. Also described are some brominated derivatives and their thermal rearrangements. A general rearrangement scheme for ten-vertex polyhedra is developed and used in the analysis of polyhedral rearrangements and assignment of structures. In an attempt to synthesize a larger homologue of this mixed-metal species the authors isolated (eta-C10H8)Co(III)CB10H11, the first metallocarborane containing a neutral arene ligand bound to the metal.

Descriptors :   *Carboranes, *Cobalt compounds, *Nickel compounds, Synthesis(Chemistry), Molecular isomerism, Metal complexes, Nuclear magnetic resonance, Molecular structure, Ultraviolet spectra, Visible spectra, Naphthalenes

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE