Polymerization of propene at -78 degrees 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 approximate to 80%). C-13 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.

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

PELLECCHIA, Claudio;ZAMBELLI, Adolfo
1996-01-01

Abstract

Polymerization of propene at -78 degrees 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 approximate to 80%). C-13 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.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11386/3131753
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