Anion effect on construction of zinc(II)coordination polymer with a chelating ligand 2,2'-dipyridylamine(Hdpa):Novel heterogeneous catalytic activities

摘要

The reaction of ZnSO4 with 2,2'-dipyridylamine(Hdpa)results in a coordination polymer 1 while other zinc(II)salts(bromide 2 or benzoateanions 3)produce usually monomers which can generate hydrogen-bonded polymers.The coordination polymer 1 and hydrogen-bonded polymer 2 have shown,surprisingly,unusual heterogeneous catalytic activities on transesterification reaction of esters,but the monomeric compound 3 catalyzed the reaction homogeneously.