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