New 1,3-Diene Complexes of Zirconium and Hafnium: One-Step Conversion of the Butadiene Fragment with Carbon Monoxide to Cyclopentadienes under Mild Conditions

Joop Blenkers, Henk J. de Liefde Meijer, Jan H. Teuben

Research output: Contribution to journalComment/Letter to the editorAcademicpeer-review

32 Citations (Scopus)


Substituted cis-diene complexes Cp*M(diene)Cl (Cp* = η-C5(CH3)5; M = Zr, Hf) were obtained by reduction of Cp*MCl3 with Na/Hg in the presence of trans-1,3-dienes. Exceptionally low 13C-1H coupling constants (138-141 Hz) of the terminal diene carbon atoms indicate a metallacyclo-3-pentene type of bonding for the diene-metal fragment. Reaction with carbon monoxide (1 atm, 25 °C) results in complete reduction of CO, splitting of the carbon oxygen bond, and formation of cyclopentadienes in which the carbon atom of the CO molecule is incorporated in the ring.
Original languageEnglish
Pages (from-to)1483-1484
Number of pages2
Issue number10
Publication statusPublished - 1983

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