Addition reactions to cyclopolyolefin transition metal π complexes |
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Authors: | DL Reger A Gabrielli |
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Institution: | Department of Chemistry, University of South Carolina, Columbia, South Carolina 29208 U.S.A. |
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Abstract: | The non-coordinated double bonds of (η4-1,2,3,4-cycloheptatriene)Fe(CO)3 and (η4-1,2,5,6-cyclooctatetraene)Co(η5-C5H5) add methylene generated from the Simmons-Smith reaction to yield (η4-2,3,4,5-bicyclo5.1.0]octa-2,4-diene)Fe(CO)3 and (η4-2,3,7,8-tricyclo7.1.0.04,6]deca-2,7-diene)Co(η5-C5H5). An analogous reaction of (η4-1,2,3,4-cyclooctatetraene)Fe(CO)3 yields (η4-6,7,8,9-tricyclo8.1.0.03,5]undeca-6,8-diene)Fe(CO)3, a product of the addition of three equivalents of methylene in which a cyclopropyl ring opening is proposed to occur. Dichlorocatbene, generated from C6H5HgCCl2Br, would not react in a similar fashion. A BH3 · THF solution would react with these starting materials but unusual products were produced. |
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