Metallocenes/methylalumoxanes: A  13 C NMR study of the reaction equilibria and polymerization | Zendy

Tritto Incoronata | Zendy; Sacchi Maria Carmela | Zendy; Locatelli Paolo | Zendy; Li San Xi | Zendy

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Metallocenes/methylalumoxanes: A 13 C NMR study of the reaction equilibria and polymerization

Author(s) -

Tritto Incoronata,

Sacchi Maria Carmela,

Locatelli Paolo,

Li San Xi

Publication year - 1995

Publication title -

macromolecular symposia

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.257

H-Index - 76

eISSN - 1521-3900

pISSN - 1022-1360

DOI - 10.1002/masy.19950970110

Subject(s) - methylaluminoxane , ethylene , polymerization , catalysis , chemistry , nuclear magnetic resonance spectroscopy , carbon 13 nmr , polymer chemistry , metallocene , nuclear chemistry , stereochemistry , organic chemistry , polymer

A study of the reactions of Cp 2 Ti 13 CH 3 CI and Cp 2 Ti(CH 3 ) 2 with AIMe 3 (TMA) and/or methylaluminoxane (MAO) and of the 13 C 90% enriched ethylene polymerization in situ in the presence of the same catalytic systems has been made by 13 C NMR spectroscopy. The NMR data have been compared with the catalytic activity. Active cation‐like species such as Cp 2 TiMe + CI·[AIMeO] n − and Cp 2 TiMe + Me·[AIMeO] n − and side products have been identified. The role of “free” and “associated” AIMe 3 , contained in MAO solutions, has been elucidated.

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