0 Hits

  • Previous / Next

You are using Science Of Synthesis as a Guest.
Please login to access the full content or check if you have access via Method 2: Titanium(II)–Arene Complexes

DOI: 10.1055/sos-SD-002-00576

Mikami, K.; Matsumoto, Y.; Shiono, T.Science of Synthesis, (20032458.

Titanium(II)arene complexes are well-defined and thermally stable; they are excellent catalysts for the specific cyclotrimerization of butadiene[‌39‌] and the dimerization of cycloheptatriene.[‌40‌] The catalytic properties of titanium(II)benzene complexes in the cyclotrimerization of butadiene were found to depend strongly on the type of halide ligands. The chloro complex typically shows a small rate constant and negligible deactivation. The bromo complex shows a much higher initial rate, but rapidly becomes deactivated. The mixed iodine-containing complexes are practically inert. The mixed chlorobromo complexes [Ti(Al2Cl8xBrx)(η6-benzene)] (x 4) exhibit higher initial reaction rates than that shown by the chloro complex.