Publication: Synthesis and characterization of neutral and cationic aluminum complexes supported by a furfuryl-containing aminophenolate ligand for ring-opening polymerization of ϵ-caprolactone
Issued Date
2018-01-01
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ISSN
13699261
11440546
11440546
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2-s2.0-85047990179
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Mahidol University
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SCOPUS
Bibliographic Citation
New Journal of Chemistry. Vol.42, No.11 (2018), 8374-8383
Suggested Citation
Jiraya Kiriratnikom, Sucheewin Chotchatchawankul, Setsiri Haesuwannakij, Supavadee Kiatisevi, Khamphee Phomphrai Synthesis and characterization of neutral and cationic aluminum complexes supported by a furfuryl-containing aminophenolate ligand for ring-opening polymerization of ϵ-caprolactone. New Journal of Chemistry. Vol.42, No.11 (2018), 8374-8383. doi:10.1039/c8nj00937f Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/45449
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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
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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].