Synthesis and characterization of a polycarbon organometallic cluster, [PPN]2[Fe6(CO)18C4].
The polycarbon metal cluster [Fe6(CO)18C4]2- is formed by the reaction of CF3SO3SO2CF3 with [Fe3(CO)9(CCO)]2-. Apparently, the SO2CF3 moiety abstracts an oxygen from the ketenylidene (CCO) ligand and C-C coupling occurs to form the C4 ligand. A single-crystal X-ray structure determination reveals that the pattern of C-C bond lengths of the C4 ligand in [Fe6(CO)18C4]2- mimic those in free butadiene.
Department of Chemistry, Northwestern University, Evanston, Illinois 60208-3113, USA.
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Norton
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Shriver