Document Detail

Ring-opening polymerization of cyclic esters with lithium amine-bis(phenolate) complexes.
MedLine Citation:
PMID:  23280340     Owner:  NLM     Status:  Publisher    
Lithium compounds of tetradentate amino-bis(phenolato)-tetrahydrofuranyl ligands, Li(2)[] () and Li(2)[] () (where [] = 2-tetrahydrofuranyl-N,N-bis(2-methylene-4-methyl-6-tert-butylphenolate), and [] = 2-tetrahydrofuranyl-N,N-bis(2-methylene-4,6-tert-butylphenolate)) were characterized by multinuclear solution NMR and solid-state (6)Li and (7)Li NMR spectroscopy. The proligands, n-propylamino-N,N-bis(2-methylene-4-methyl-6-tert-butylphenol), (H(2)[]) and benzylamino-N,N-bis(2-methylene-4,6-di-tert-amylphenol), H(2)[] were reacted with n-butyllithium in THF to give the related dilithium compounds Li(2)[] () and Li(2)[] (), respectively. The pyridine adduct of , (py)(2)Li(2)[] () and complexes and have been structurally characterized by single-crystal X-ray diffraction and NMR spectroscopy. The reactivity of these complexes for the ring-opening polymerization of rac-lactide, as well as the influences of monomer concentration, monomer/Li molar ratio, polymerization temperature and time, were studied.
Rebecca K Dean; Amy M Reckling; Hua Chen; Louise N Dawe; Celine M Schneider; Christopher M Kozak
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-1-2
Journal Detail:
Title:  Dalton transactions (Cambridge, England : 2003)     Volume:  -     ISSN:  1477-9234     ISO Abbreviation:  Dalton Trans     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2013-1-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101176026     Medline TA:  Dalton Trans     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland A1B 3X7, Canada.
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