Journal
ORGANOMETALLICS
Volume 37, Issue 6, Pages 837-840Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.organomet.7b00843
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Funding
- MICINN (I3 program) [SPI1752XV0]
- UAH [CCG08-UAH/PPQ4203, UAH-AE-2017-2]
- MINECO [CTQ201458270-R]
- UAH
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The diphenoxyimine five-coordinated aluminum complex [AIMeL(2)] (1), (L = N-(2,6-diisopropylphenyl)-phenoxyimine), has been synthesized and fully characterized. The mononuclear structure observed in the solid state by X-ray diffraction analysis is maintained in solution, as shown by diffusion-ordered NMR spectroscopy (DOSY). Complex 1 is an active ROP catalyst able to provide well-controlled living ring-opening polymerization of rac-BBL at 100 degrees C, with PDI = 1.03, in the presence of BnOH to give the biodegrable polyester poly(hydroxybutyrate) (PHB). The suggested active species of this catalytic process, the aluminum complex [Al(OBn)L-2] (2), has been synthesized and fully characterized. DFT calculations have been carried out to study the influence of the catalytic active species pocket over the polymer molecular weight control. Moreover, 1 is also active in the copolymerization of rac-beta-butyrolactone and L-lactide to provide random copolymers.
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