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Analogies and Differences in Palladium‐Catalyzed CO/Styrene and Ethylene/Methyl Acrylate Copolymerization Reactions
Author(s) -
Rosar Vera,
Meduri Angelo,
Montini Tiziano,
Fini Francesco,
Carfagna Carla,
Fornasiero Paolo,
Balducci Gabriele,
Zangrando Ennio,
Milani Barbara
Publication year - 2014
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201402192
Subject(s) - copolymer , methyl acrylate , styrene , polymer chemistry , ethylene , palladium , catalysis , acenaphthene , chemistry , acrylate , ligand (biochemistry) , organic chemistry , polymer , receptor , pyrene , biochemistry
The catalytic CO/styrene and ethylene/methyl acrylate copolymerizations are compared for the first time by applying the same precatalysts. With this aim, Pd II neutral, [Pd(CH 3 )Cl(N–N)], and monocationic, [Pd(CH 3 )(L)(N–N)][PF 6 ] (L=CH 3 CN, DMSO), complexes with 1‐naphthyl‐ and 2‐naphthyl‐substitued α‐diimines with both an acenaphthene and a diazabutadiene skeleton as chelating nitrogen‐donor ligands (N–N) have been studied. In the case of the complexes with the 1‐naphthyl‐substituted ligands, syn and anti isomers are found both in solid state and in solution. All the monocationic complexes generate active catalysts for the CO/styrene copolymerization leading to atactic or isotactic/atactic stereoblock copolymers depending on the ligand bonded to palladium. Instead, in the case of the ethylene/methyl acrylate copolymerization only the complexes with the 1‐naphthyl‐substituted ligands generate catalysts for this reaction.