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Journal of the Chilean Chemical Society

versão On-line ISSN 0717-9707

Resumo

ATHAR, TAIMUR; HAKEEM, ABDUL  e  TOPNANI, NEHA. SYNTHESIS OF β-DIKETIMINATE DERIVATIVES OF ZINC ALKOXIDES: CATALYTIC PROPERTIES FOR RING OPENING POLYMERIZATION. J. Chil. Chem. Soc. [online]. 2011, vol.56, n.4, pp.887-890. ISSN 0717-9707.  http://dx.doi.org/10.4067/S0717-97072011000400014.

A series of zinc (II) complexes has been prepared based on a β-diketiminate ligand framework and exhibits the highest rate of polymerization with better stereoselectivity in the formation of polylactic from the rac-lactide with aggregation and narrow polydisperties. Degree of aggregation and their reactivity's depends on the nature of alkoxy groups, the role of metal ion, solvent and their structural properties. The nature of substituent group on β-diketiminate ligand exerts a significant change affecting both the degree of selectivity and the rate of polymerization. The polymerizations are living, as evidenced by the narrow polydisperties and with their linear nature and average molecular weight.

Palavras-chave : β-diketiminato Zinc alkoxides; PLA and PCL; Ring opening polymerization.

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