| Abstract
| - The reaction of LTiCl3 (1) (L = HC(CMeN(2,6-iPr2C6H3))2, nacnac) with MeLi·(Et2O)0.14 in toluene afforded the stable Ti(IV) alkyl complex LTiMe3 (1). Reaction of 1 with 2 equiv of AlMe3 in toluene resulted in the formation of LTi(Me)CH(Al2Me5) (2) in high yield. Compounds 1 and 2 were characterized by X-ray structural analysis, NMR, IR, mass spectrometry, and elemental analysis. The Ti−CH bond length (1.880(2) Å) of 2 is in the range of a short Ti−C bond. This was additionally supported by NMR and DFT calculations. Compound 2 polymerized ethylene without adding any cocatalyst, although activity is low; the best TOF value was 2.4 × 104 g(polymer)/mol catalyst·h·bar.
- The heterometallic Ti(IV)−Al(III) complex LTi(Me)CH(Al2Me5) containing the TiCH[Al2Me4(μ-Me)] moiety with a formal TiC bond was prepared directly from room-temperature-stable LTiMe3 and AlMe3.
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