Abstract
Novel enantiopure Cu(II) complexes of (R,R)-N1,N2-dimethyl-bis(naphthalen-1-ylmethyl)cyclohexane-1,2-diamine (1-NMCD) and (R,R)-N1,N2-dimethyl-bis(naphthalen-2-ylmethyl)cyclohexane-1,2-diamine (2-NMCD) ligands were synthesized and characterized by X-ray diffraction. X-ray diffraction analysis revealed that the molecular structures of the synthesized complexes were mononuclear with Cu(II) atoms in distorted square planar geometries. The diisopropoxide derivatives generated in situ catalyzed ring opening polymerization (ROP) of rac-lactide (rac-LA) in a controlled fashion and displayed unusually high activities (10s or 25s for complete conversion). Heterotactic enriched PLA (with Pr up to 0.90) was obtained with initiator bearing 2-NMCD in CH2Cl2.
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