Synthesis, characterization and applications in ethylene polymerization of asymmetric ansa-titanocene complexes. Molecular structure of [Ti{Me2Si(η5-C5Me4)(η5-C5H3iPr)}Cl2]

The synthesis and structural characterization of the ansa-titanocene complexes, [Ti{Me2Si(η5-C5Me4)(η5-C5H3R)}Cl2] (R = Me, iPr, tBu, SiMe3), are reported. They have been tested as catalysts in the polymerization of ethylene.