| 摘要 |
Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a dirhenium halide having (a) a double or triple bond between a pair of rhenium atoms, and (b) a bis(dihydrocarbylphosphino)alkane coordinated therewith, and (ii) a Group III-A alkoxide in which the alkoxy groups are perfluorinated or are substantially perfluorinated. The complexes can be produced very easily and quickly. All that is required is to establish intimate contact between components (i) and (ii), preferably in an innocuous liquid organic solvent. 3-Heptyne was metathesized in good yields by means of the complex formed from Re2Cl4(dppm)2 and Al(OCH(CH3)2)3, and the complex formed from Re2Cl6(dppm)2 and Al(OCH(CF3)2)3 (dppm=bis(diphenylphosphino))methane).
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