Tetracoordinate aluminum complexes bearing phenoxy-based ligands as catalysts for epoxide/anhydride copolymerization: some mechanistic insights

Autor:	Claudio Pellecchia, Florence Isnard, Federica Santulli, Marina Lamberti, Mina Mazzeo, Mariachiara Cozzolino
Rok vydání:	2019
Předmět:	Phthalic anhydride Tetracoordinate 010405 organic chemistry Chemistry Ligand technology industry and agriculture Succinic anhydride Epoxide 010402 general chemistry 01 natural sciences Catalysis 0104 chemical sciences chemistry.chemical_compound Polymer chemistry Copolymer Cyclohexene oxide
Zdroj:	Catalysis Science & Technology. 9:3090-3098
ISSN:	2044-4761 2044-4753
DOI:	10.1039/c9cy00806c
Popis:	A series of dimethyl aluminum complexes of the type [E,O]AlMe2 stabilized by phenoxy-imine, phenoxy-thioether and phenoxy-amine ligands have been tested as catalysts for the ring-opening copolymerization of epoxides and anhydrides. All complexes revealed to be active in the copolymerization of cyclohexene oxide with succinic anhydride showing activities higher than pentacoordinate salen aluminum complexes. Interestingly, these complexes revealed to be active in the copolymerization of limonene oxide with phthalic anhydride. A moderate influence of the ligand structure on the efficiency and selectivity of the catalyst was also observed. Some mechanistic insights have been gained through NMR studies allowing the identification of a zwitterionic species formed in the initiating step of the polymerization reaction.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6be768703e91b1338ab5b2c359452c1e https://doi.org/10.1039/c9cy00806c Zobrazit plný text záznamu