title: Zinc complexes containing coumarin-derived anilido-aldimine ligands as catalysts for ring opening polymerization of L-lactide.
abstract: The coumarin-derived ligand precursors L(1)H-L(6)H have been prepared. Treatment of these ligand precursors with 1.2 equiv. of ZnEt2 in toluene affords zinc ethyl complexes (LZnEt) 1-6 (where L = coumarin-derived ligands bearing different functional groups). Reaction of ligand precursor L(3)H with 1.5 equiv. of Zn[N(SiMe3)2]2 in toluene affords the zinc amide complex, L(3)ZnN(SiMe3)2, 7. All these compounds were characterized by NMR spectroscopy and elemental analysis. The molecular structures are reported for 1 and 7. The catalytic activities of complexes 1-7 towards the ring opening polymerization of l-lactide in the presence of 9-AnOH have been investigated.
authors: Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. ctchen@dragon.nchu.edu.tw.
authors: Chi-Tien
authors: CT
authors: Chen
authors: Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. a23444452@gmail.com.
authors: Min-Chian
authors: MC
authors: Wang
authors: Department of Chemistry, National Chung Hsing University, Taichung 402, Taiwan. s912218@gmail.com.
authors: Tzu-Lun
authors: TL
authors: Huang
mesh_terms: D000814:Aniline Compounds / Q000737:chemistry*; D002384:Catalysis; D056831:Coordination Complexes / Q000138:chemical synthesis* / Q000737:chemistry; D003374:Coumarins / Q000737:chemistry*; D004146:Dioxanes / Q000138:chemical synthesis* / Q000737:chemistry; D008024:Ligands; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D058105:Polymerization; D015032:Zinc / Q000737:chemistry*
chemical_list: D000814:Aniline Compounds; D056831:Coordination Complexes; D003374:Coumarins; D004146:Dioxanes; D008024:Ligands; C091880:dilactide; C030123:coumarin; D015032:Zinc