Syndiotactic-specific polymerization of propene with a Ni-based catalyst

✍ Scribed by Claudio Pellecchia; Adolfo Zambelli

• Book ID: 102492071
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 270 KB
• Volume: 17
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.1996.030170508

✦ Synopsis

Abstract

Polymerization of propene at −78°C in the presence of a homogeneous catalytic system based on a Ni(II) diimine derivative and methylaluminoxane affords prevailingly syndiotactic crystalline poly(propylene) (rr triad content ≈80%). ^13^C NMR analysis of the polymer microstructure indicates that the stereochemistry of the monomer insertion is controlled by the configuration of the methine carbon of the growing chain end (unlike‐1,3 asymmetric induction). This is the first example of stereospecific homopolymerization of propene promoted by a late transition metal catalyst.