Synthesis and crystal structure of tetra(imidazole) copper(II) terephthalate

The molecular structure of tetra(imidazole)copper(II) terephthalate was determined by single-crystal X-ray diffraction methods. The complex is triclinic, space group , with a = 8.0299(6), b = 8.4180(7), c = 8.8992(4) A, α = 77.122(3), β = 68.898(3), γ = 76.116(2)°, V = 538.59(7) A3. The Cu(II) atom is located on an inversion center and assumes tetragonally elongated octahedral coordination geometry, with an axial Cu–O(carboxyl) bond distance of 2.682(2) A. The terephthalate dianion is located on another inversion center and bridges neighboring Cu(II) atoms to form polymeric chains. IR spectra of the complex are consistent with the crystal structure.