Synthesis, Crystal Structure of Three Novel Manganese(II) Complexes With 2-propyl-4,5-imidazoledicarboxylic Acid

Abstract

Three novel complexes {[Mn₃(pimdc)₂(H₂O)₅]·H₂O}_n (1), [Mn(H₂pimdc)₂(2,2′-bpy)] (2), and [Mn₃(Hpimdc)₂(H₂pimdc)₂ (4,4′-bpy)₂(H₂O)₂]_n (3) (where H₃pimdc = 2-propyl-4,5-imida- zoledicarboxylate; bpy = 2,2/4,4-bipyridine) have been prepared and characterized by infrared spectrum, thermal analysis, and X-ray crystal diffraction. H₃pimdc forms three kinds of coordination modes due to the different pH of solution. In 1, two Mn(II) centers connected through the coordinated ligands of H₃pimdc to form a 3D framework. Complex 2 forms a 3D framework through hydrogen bonds and C–H···π interactions. In 3, 1D chains are engaged in hydrogen-bonding interactions with coordinated water O9 and carboxylate oxygens O4 and O6 forming a higher dimensional structure.

Supplemental materials are available for this article. Go to the publisher's online edition of Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry to view the supplemental file.

Keywords:

• 2-propyl-4
• 5-imidazoledicarboxylate acid
• hydrogen bond
• manganese(II) complexes
• X-ray crystal diffraction

Acknowledgments

The authors thank the Innovation Project of Guangxi University for Nationalities (gxun-chx2012087).