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Title: Synthesis and characterization of neutral and cationic aluminum complexes supported by a furfuryl-containing aminophenolate ligand for ring-opening polymerization of ϵ-caprolactone
Authors: Jiraya Kiriratnikom
Sucheewin Chotchatchawankul
Setsiri Haesuwannakij
Supavadee Kiatisevi
Khamphee Phomphrai
Vidyasirimedhi Institute of Science and Technology
Mahidol University
Keywords: Chemical Engineering;Chemistry;Materials Science
Issue Date: 1-Jan-2018
Citation: New Journal of Chemistry. Vol.42, No.11 (2018), 8374-8383
Abstract: © 2018 The Royal Society of Chemistry and the Centre National de la Recherche Scientifique. The synthesis, structural characterization and reactivity of aluminum complexes supported by a novel tetradentate aminophenolate ligand containing furfuryl groups (LH), LAlMe2 (1), LAlMeCl (2) and LAlMeOtBu (3), are described. The molecular structures of ligand LH and complexes 1-3 are determined by X-ray structural analysis. Complexes 1-3 contain a four-coordinated mononuclear aluminum center. Activation of complex 1 with either B(C6F5)3 or [Ph3C][B(C6F5)4] afforded the corresponding cationic complex, [LAlMe][MeB(C6F5)3] or [LAlMe][B(C6F5)4], respectively. All cationic complexes were stable at room temperature in the absence of an external Lewis base over a week. The cationic complex [LAlMe][MeB(C6F5)3] decomposed upon heating at 70 °C, giving a neutral LAlMe(C6F5) complex. Complexes 1-3 were inactive for the ring-opening polymerization (ROP) of ϵ-caprolactone (CL) at room temperature. However, only the cationic aluminum complex [LAlMe][MeB(C6F5)3] in the presence of benzyl alcohol was found to be active in the ROP of CL at room temperature in a well-behaved manner, giving a first-order reaction with respect to [CL].
ISSN: 13699261
Appears in Collections:Scopus 2018

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