Abstract
The chromium alkyl complex Cp*Cr(py)Me2 (Cp* = η5-pentamethylcyclopentadienyl, py = pyridine, Me = methyl) has been affixed to the surface of zeolite MCM-22 via methane elimination. The resulting composite material has been characterized by a variety of physical methods. The results are consistent with the presence of isolated organometallic fragments linked to the solid support by a covalent chromium–oxygen bond. Activation of this material with methylaluminoxane (MAO) yielded a highly active catalyst for the polymerization of ethylene. The polyethylene thus formed featured high molecular weights (Mw ∼ 4 × 106) and narrow molecular weight distributions (Mw/Mn ∼ 3.5).
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