Pressure modulates stereoregularities in the polymerization of propylene promoted by rac-octahedral heteroallylic complexes

Victoria Volkis, Michal Shmulinson, Claudia Averbuj, Anatoli Lisovskii, Frank T. Edelmann, Moris S. Eisen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

118 Scopus citations

Abstract

This communication reports the synthesis and activity of four racemic mixtures of bis(benzamidinate) group-4 complexes, cis-[p-R′C6H4C(NR)2]2MX 2 (R′ = CH3, R = SiMe3, M = Ti, X = Cl (1); R′ = CH3, R = SiMe3, M = Zr X = Cl (2); R′ = H, R = i-pr, M = Zr, X = Cl (3); R′ = CH3, R = SiMe3, M = Zr, X = CH3 (4)) as precatalysts for the stereoregular polymerization of propylene. These complexes catalyze the stereoregular polymerization of propylene only under pressure in CH2Cl2, producing polypropylene with very large isotacticities (mmmm % = ∼95-98), high melting points (140-154 °C).

Original languageEnglish
Pages (from-to)3155-3157
Number of pages3
JournalOrganometallics
Volume17
Issue number15
DOIs
StatePublished - 20 Jul 1998
Externally publishedYes

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