Novel Coordination Compounds Based on 2-Methylimidazole and 2,2- Dimethylglutarate: Synthesis and Characterization

Abstract

Two novel complexes, [Cu2(-dmg)2(2-meim)4]∙5H2O (1) and {[Cd(-dmg)(2-meim)2]∙H2O}n(2), with 2-methylimidazole (2-meim) and 2,2-dimethylglutarate (dmg) as ligands, have beensystematically prepared by a conventional method. As a result, organic-inorganic crystalline solids wereobtained. Their solid-state structures have been solved with elemental analysis, fourier transform infraredspectroscopy (FTIR) Powder X-ray diffraction (PXRD) and single-crystal X-ray diffraction (XRD). The Cu(II)ions displayed a distorted square planar geometry (CuO2N2), while Cd(II) ions showed a distortedoctahedral geometry (CdO4N2). Complex 1 formeda dimeric structure, in which the Cu(II) ions werebridged by dmg. These dimeric units were extended to the 3D supramolecular structure with hydrogenbonding and -bonding interactions. Complex 2 formed a 1D polymeric structure, where the Cd(II) ionswere linked by dmg ligand to form 1D zig-zag polymer layers which were further extended in 3Dsupramolecular structure through molecular interactions as complex 1. Moreover, the thermal properties ofthe complexes were reported.