Synthesis, Characterization and Crystal Structure Determination of a Hepta-coordinated Cadmium(II) Complex with Thiocyanatobridges

A new cadmium(II) complex [(C28H24N6) Cd(SCN)(2)](2)(CH3OH)(2) (1) has been synthesized and characterized by IR, UV spectra, TG-DTA technique and single crystal X-ray diffraction analysis. The crystallographic data for compound 1: triclinic P (1) over bar, a = 9.630(2) angstrom, b = 11.123(3) angstrom, c = 15.396(4) angstrom, alpha = 106.93(1)degrees, beta = 91.60(1)degrees, gamma = 99.99(1)degrees, V = 1,548.5(6) angstrom(3), Z = 1, Dc = 1.512 mg/m(3), F(000) = 716, R-1 = 0.0332, wR(2) = 0.0907. The molecule contains a symmetrical dinuclear unit in which two Cd(II) ions are double bridged by two di-mu-1,3-SCN- anoins with a cadmium-cadmium separation of 6.48 angstrom. Each Cd(II) ion is seven-coordinated with six nitrogen atoms and a sulfur atom to form a monocapped trigonal prism coordination geometry. In addition, the molecule is further connected by multiform intermolecular C-H center dot center dot center dot pi, pi center dot center dot center dot pi interactions and hydrogen bonds to form a three-dimensional supramolecular structure.