Zinc complexes supported by N,N-dimethylaniline-arylamido ligands: Synthesis, characterization and catalytic properties for ring-opening polymerization of L-lactide

Abstract

The reaction of bidentate N,N-dimethylaniline-arylamido ligands, o-C₆H₄NMe₂(CH₂NHAr)(Ar = Ph, 1a; 2,6-Me₂C₆H₃, 1b; 2,6-Et₂C₆H₃, 1c; 2,6- ⁱPr₂C₆H₃, 1d) with ZnEt2 yields the complexes o-C₆H₄(NMe₂)(CH₂NAr)ZnEt (2a-2d), respectively. All the complexes were characterized by ¹H and ¹³C NMR spectroscopy and elemental analyses. It was found that all the zinc complexes were efficient catalysts for the ring-opening polymerization of L-lactide in the presence of benzyl alcohol with good molecular weight control and narrow polydispersity.

Keywords

Zinc complex; Ring-opening polymerization; L-Lactide

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