摘要
Two amino-benzotriazole phenol ligands, 2-(2H-benzotriazol-2-yl)-6- ((diethylamino)methyl)-4-alkyl-phenol (alkyl = CH 3 , C1DEA BTP-H, and alkyl = C 8 H 17 , C8DEA BTP-H) were prepared through the Mannich condensation of 4-alkyl-2-(2H-benzotriazol-2-yl)phenol with the mixtures of excess paraformaldehyde and diethylamine under reflux conditions. Zinc complexes supported by amino-benzotriazole phenoxide ligands ( C1DEA BTP - and C8DEA BTP - ) were synthesized and fully characterized. The reaction of ZnEt 2 with DEA BTP-H (1 equiv.) produces the tetra-coordinated dimeric zinc complexes [(μ- C1DEA BTP)ZnEt] 2 (1) and [(μ- C8DEA BTP)ZnEt] 2 (2). Experimental results indicate that complex 1 catalyzes the ring-opening polymerization of ε-caprolactone and β-butyrolactone with good catalytic activities in a controlled character. © 2011 Elsevier B.V.