Well-controlled ring-opening polymerization of cyclic esters initiated by dialkylaluminum β-diketiminates
Authors:
- 30 May 2013
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Dalton Transactions
- Vol. 42 (31) , 11295-11303
Abstract
A series of aluminum alkyl complexes nacnacRAlMe2 (2a–2h) bearing aliphatic N-substituted β-diketiminate ligands (nacnacRH = N,N′-dialkyl-2-amino-4-iminopent-2-enes), were prepared from the reaction of trialkyl aluminum and the corresponding β-diketimines. All these aluminum complexes were characterized by NMR, elemental analysis and HRMS spectroscopy. The molecular structures of complexes 2a, 2c and 2h were confirmed by single-crystal X-ray diffraction. These aluminum alkyl complexes show notable activity towards the ring-opening polymerization of ε-caprolactone in the absence and presence of alcohol, and the resulting polymers have narrow molecular weight distributions.Keywords
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