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Dual zinc catalysts for L ‐lactide polymerization and reaction of CO 2 with cyclohexene oxide
Author(s) -
Wang WeiChu,
Hsu ShihHsien,
Su YuChia,
Chen HsuanYing,
Lin ChuChieh
Publication year - 2019
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.201900168
Subject(s) - chemistry , cyclohexene oxide , catalysis , polymerization , zinc , lactide , polymer chemistry , medicinal chemistry , cyclohexene , benzyl alcohol , oxide , organic chemistry , polymer
A series of zinc complexes, [ L X ZnEt] ( 1–5 ) and [ L X Zn 2 (OAc) 3 ] (6–9) , associated with NNO‐tridentate Schiff base ligands (2‐(((2‐((cyclohexyl[methyl]amino)methyl)phenyl)imino)methyl)phenolate (CAP) derivatives), were synthesized, and their activity toward ring‐opening polymerization (ROP) of L ‐lactide (LA) and the reaction of CO 2 with cyclohexene oxide were also investigated. All of [ L X ZnEt] revealed excellent catalytic activity to ring‐opening polymerization (ROP) of LA in the presence of benzyl alcohol. Among them, [ L H ZnEt] (1) showed the highest activity with 82% conversation within 45 s. In contrast, [L X Zn 2 (OAc) 3 ] (6–9) were inactive in ROP of L ‐lactide. In addition, all of these Zn complexes demonstrated moderate activity in the reaction of CO 2 with cyclohexene oxide in the presence of Bu 4 NCl.