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Unformatted text preview: only by the use of transition metal coordination (Ziegler-Natta) polymerization. Transition Metal Coordination Catalyst CH 2 =CH -(CH 2-CH) -x CH 3 CH 3 * Mechanism of Stereospecific Placement Coordination initiator performs two function. First, they supply the species for polymerization. Second, the fragment of the initiator aside from the initiating portion has unique coordination powers. Coordination of this fragment with both the propogating chain end and the incoming monomer occurs so as to orient the monomer with respect to the growing chain end and bring about its stereospecific addition. In other words, the monomer is oriented and "held in position" by coordination during addition to the polymer chain....
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- Fall '10