Wasserstoff-wanderungen in organometall-verbindungen: Die thermisch induzierte isomerisierung des (η-cyclopentadienyl)(η-1,1-dimethylallyl)(η-isopren)-zirconiums |
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Authors: | Klaus Berg Gerhard Erker |
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Institution: | Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-4330 Mulheim a.d. Ruhr B.R.D. |
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Abstract: | Treatment of CpZrCl3 with 3-methylbutenyl-Grignard reagent yields thermally labile tris(1,1-dimethylallyl) ZrCp (6), which is slowly decomposed (5d) at −15°C to give (η-cyclopentadienyl)(η3-1,1-dimethylallyl)(η4-isoprene)zirconium (7), which is thermally unstable; with a half-live of 43 h at 20°C it rearranges to the η3-1,2-dimethylallyl isomer and an (isoprene) zirconium hydride is proposed as the intermediate for this hydrogen-migration reaction. |
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