Synthesis, Crystal Structure, and Properties of Two Zinc(II) Complexes With 2-propyl-4,5-imidazoledicarboxylic Acid

Abstract

A tetradentate 2-propyl-4,5-imidazoledicarboxylic acid [H₃pimdc] reacts with zinc sulfate in the ethanol aqueous solution and zinc acetate in the N,N-dimethylformamide (DMF) aqueous solution to give two complexes [Zn(H₂pimdc)₂(H₂O)₂]·4H₂O and [Zn(H₂pimdc)₂(H₂O)₂]·2DMF. The complexes were characterized by X-ray single crystal analysis, thermal analysis, and IR spectrum. Because of the different coordination of water, complex 1 forms a fishing net–like latticed topology geometry via hydrogen bonds and π-π stacking interaction, but complex 2 forms a layer-like topology geometry via hydrogen bonds and π-π stacking interaction.

Keywords:

• butterfly
• 2-propyl-4
• 5-imidazoledicarboxylic acid
• π-π stacking
• solvent system
• thermogravimetric analysis

Acknowledgments

The authors thank the National Natural Science Foundation of China (20761002), P. R. China, and the Natural Science Foundation of Guangxi (0832080), P. R. China, and the Innovation Project of Guangxi University for Nationalities (gxun-chx2010083).