Analogies and Differences in Palladium‐Catalyzed CO/Styrene and Ethylene/Methyl Acrylate Copolymerization Reactions. Issue 8 (10th July 2014)

• Record Type: Journal Article
• Authors: Rosar, Vera; Meduri, Angelo; Montini, Tiziano; Fini, Francesco; Carfagna, Carla; Fornasiero, Paolo; Balducci, Gabriele; Zangrando, Ennio; Milani, Barbara
• Is Part Of: ChemCatChem. Volume 6:Issue 8(2014:Aug.)
• Page Start: 2403
• Page End: 2418
• Publication Date: 2014-07-10
• Subjects: Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201402192
• Languages: English
• ISSNs: 1867-3880

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>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 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, <italic>syn</italic> and <italic>anti</italic> 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.</p> </abstract>