Die Kombination (C5H5)2TiCl2‐(CH3)2AlCl hat, wenn überhaupt, nur geringe katalytische Aktivität für die Polymerisation von Äthylen. Die Zugabe geringer Mengen Wasser, ca. 0.2 –0.5 mol pro mol Aluminium, verwandelt diese Kombination in einen außerordentlich aktiven Katalysator. Andere Zusätze, z. B. Alkohole oder Sauerstoff, haben nicht die gleiche Wirkung. Der Reaktionsmechanismus wird diskutiert.
total amount of gas was liberated. The solid was collected under nitrogen, washed with methanol and ether, and dried.Anal. Caled, for Ni(CH2=CHCN)2: Ni, 35.62; acrylonitrile, 64.38. Acrylonitrile was determined by careful thermal decomposition of the nickel complex in a high vacuum apparatus. The volatile fraction was weighed and identified by infrared analysis as pure acrylonitrile.
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