The binuclear complex [Cp2Zr(μ-Cl)(μ-CH2Me)AlMeEt] 1 attached to a support is formed by the reaction of [Cp2ZrMe2] and MgH2 after the addition of the cocatalyst (Et2AlCl)2. Species 1 catalyzes the polymerization of ethylene by inserting ethylene molecules into the Zr–μ-alkyl bond. The intermediate steps in the formation of 1 and the polymerization could be observed by means of 13C CP/MAS NMR spectroscopy.
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Benn et al. (1991) studied this question.
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