Study of exchange reactions in soluble systems of the Ziegler-Natta type

Sosnovskaja, L.N.; Fushman, É. A.; Borisova, Ludmila; Shupik, N.

doi:10.1016/0304-5102(80)80033-2

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On the mechanism of activation of homogeneous catalytic systems of Ziegler type

Fušman¹,

Šupik²,

L'vovskij³

et al. 1983

Acta Polymerica

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IIpeAJIOXeHa CTpyKTypa aK-T m H o r o q e q T p a nonmepnaaqmi (Cp,TiEtCl-Y)H+y'B-, ~~nrosaro~qarr KHCJIOT~I JIbmica Y H Y', a T a H x e ~~O T O -HoAoHopHbIe MoneKynhI HB. Zum Mechanismus der Aktivierung homogener katalytischer Systeme vom Ziegler-Typ Die zur Aktivierung homogener katalytischer Systeme fur die Ethylenpolymerisation unter Beteiligung von CpaTiEtCl fuhrenden Prozesse werden betrachtet. Anhand kinetischer Daten und der ,?Al-NMR-Spektren wird fur das aktive Zentrum der Polymerisation die Struktur (Cp,TiEtCl-Y) H+Y'B-vorgeschlagen, die die Lewis-Sauren Y und Y' sowie die Protonendonormolekule HB einbezieht.On the mechanism of activation of homogeneous catalytic systems of Ziegler type Activation processes of homogeneous catalytic systems of ethylene polymerization on the basis of Cp,TiEtCl are analyzed. The kinetic and Z' Al-NMR data lead to the conclusion that the active center of polymerization has the structure (Cp,TiEtCl. Y)H+Y'B-, which involves Lewis acids Y and Y' and the proton-donor molecule HB.

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