Kyuong Seop Kwon, S. Nayab, Hong-In Lee
Apr 18, 2017
Citations
0
Influential Citations
16
Citations
Journal
Polyhedron
Abstract
Abstract Novel Zn(II) complexes, (N1E,N2E)-N1,N2-bis(1,7,7-trimethylbicyclo [2.2.1]heptan-2-ylidene)butane-1,2-diamine (BCE) ZnCl2 and (N1E,N3E)-2,2-dimethyl-N1,N3-bis(1,7,7-trimethylbicyclo [2.2.1]heptan-2-ylidene)pentane-1,3-diamine (BCP) ZnCl2, were synthesised. X-ray diffraction analysis revealed that the geometry around the Zn(II) centre is distorted tetrahedral. The alkoxy derivatives, generated in situ, were highly efficient catalysts for ring-opening polymerisation (ROP) of rac-lactide (rac-LA), yielding polylactide (PLA) with good number-average molecular weights and narrow polydispersity indices. (BCP)Zn(OCHMe2)2 exhibited activity for stereoselective ROP of rac-LA, and complete conversion occurred within 8 min to attain heterotactic PLA (Pr = 0.78).