Zinc(II) Complexes with Dangling Functional Organic Groups

Zinc(II) complexes with dangling functional organic groups were synthesized by reaction of zinc acetate with a series of bifunctional -substituted benzene derivatives (a combination of carboxylate, oximate, amino, β-ketoimine, and salicylaldime groups). Selective coordination to carboxylate groups was observed when the second functional group was an oxime or β-ketoimine group. When the second group was an amine or salicylaldimine moiety, these groups were additionally coordinated. From the reaction with -aminobenzoic acid, the compound [Zn(OOCCH)(OOC-CH-NH)] was crystallized. It is a three-dimensional coordination polymer with bridging aminobenzoate ligands.