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 language | English |
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Pages (from-to) | 3155-3157 |
Number of pages | 3 |
Journal | Organometallics |
Volume | 17 |
Issue number | 15 |
DOIs | |
State | Published - 20 Jul 1998 |
Externally published | Yes |