期刊
CHEMCATCHEM
卷 6, 期 8, 页码 2403-2418出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201402192
关键词
alkenes; copolymerization; N ligands; palladium; homogeneous catalysis
资金
- Consorzio Interuniversitario Nazionale per la Scienza e Tecnologia dei Materiali
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(CH3) Cl(N-N)], and monocationic, [Pd(CH3)(L)(N-N)][PF6] (L= CH3CN, DMSO), complexes with 1-naphthyl- and 2-naphthyl-substitued alpha-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.
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