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Dimethylaluminum complexes bearing a chiral diketiminate ligand: Synthesis, characterization and ring-opening polymerization of epsilon-caprolactone

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期刊论文
First Author:
Kong, Dexu
Correspondence Author:
Peng, Y (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Sch Pharmaceut Sci & Technol, Dalian 116024, Peoples R China.
Co-author:
Peng, Ying,Li, Di,Li, Yang,Chen, Pingping,Qu, Jingping
Date of Publication:
2012-08-01
Journal:
INORGANIC CHEMISTRY COMMUNICATIONS
Included Journals:
SCIE、Scopus
Document Type:
J
Volume:
22
Page Number:
158-161
ISSN No.:
1387-7003
Key Words:
Aluminum complexes; Chiral beta-diketiminate ligand; epsilon-Caprolactone; Initiator; Ring-opening polymerization
Abstract:
Reaction of the chiral aliphatic N-substituted diketiminate ligand, N,N'-Di(R-phenylethyl)-2-amino-4-iminopent-2-ene (R,R-nacnac(CH(Me)Ph)H), with AlMe3 affords the monomeric dimethylaluminum complex R,R-nacnac(CH(Me)Ph)AlMe(2) (R,R-1). Complex S,S-nacnac(CH(i-Pr)Ph)AlMe(2) (S,S-2) is prepared by S,S-nacnac(CH(i-Pr)Ph)H and AlMe3. Complexes R,R-1 and S,S-2 are the first examples of chiral beta-diketiminate ligands with main group metals. All these two complexes exhibit activity for the ring-opening polymerization of epsilon-caprolactone in the absence of alcohol, and complex R,R-1 shows a higher activity with a narrow molecular weight distribution (PDI = 1.17) in toluene. (C) 2012 Elsevier B.V. All rights reserved.

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