Synthesis and crystal structure of 2,2'-(1,4-butanediyl)bis-(1H- benzoimidazole) Cd(II) complex

A novel Cd(II)complex (1) with 2,2'-(l,4-butanediyl)bis(lH-benzimidazole) (H₂C₄BIm) has been synthesized and characterized by X-ray single-crystal diffraction analysis. The complex crystallizes in monoclinic, space group P21/C with a = 7.003(5) Å, b = 18.111(5) Å, c = 16.566(5) Å, V = 2099.4(17) ų, Z = 4, C ₂₁H₂₄N₄O₆Cd, Mr = 540.84, Dc = 1.711 g cm^-3, F(000) = 1096, μ = 1.088 mm^-1, the final R = 0.0367 and wR = 0.0622 for 3367 observed reflections with I > 2σ(I). The coordination geometry of Cd(II) atom is 5-coordinated to form trigonal bipyramidal geometry. The crystal structure is represented by continuous zigzag chains of C₂₁H₂₄N₄O₆Cd molecules, these continuous zigzag chains are further linked by intermolecular hydrogen bondings and C-H-:π interaction into a 3-dimensional framework.