Abstract
The reactivity of the cationic vinylidene complexes [Fe{CC(R 1)R 2}(η-C 5H 5(dppm)] + toward different nucleophiles has been investigated. Whereas the disubstituted complexes (R 1 = Me; R 2 = Ph or tBu) are unreactive with water and methanol, the addition of the anion hydride proceeds stereoselectively to give the alkenyl E isomers. The structure of ( E)-[Fe{C(H)C(Me)Ph}(η-C 5H 5(dppm)] has been determined by an X-ray diffraction study. Nucleophilic additions to the unsubstituted complex (R 1 = R 2 = H) have also been examined.
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