Synthesis and Characterization of the Adducts of Bis(O-butyldithiocarbonato)nickel(II) with Substituted Heterocyclic Amines and X-ray Structure of Bis(O-butyldithiocarbonato)bis(4-cyanopyridine)nickel(II)

Abstract

We report the synthesis and study of a new series of the adducts of Bis(O-butyldithiocarbonato)nickel(II) with substituted heterocyclic amines such as amino and cyanopyridines. Analytical results show that the adducts have 1:2 stoichiometry with general formula M(Xan)2 L 2 (M = Ni(II), Xan = O-butyldithiocarbonate, L = 2-, 3- and 4-aminopyridines, 3- and 4-cyanopyridines). The complexes have been characterized by analytical, magnetic susceptibility measurements, molar conductivity measurements, IR, electronic spectral data and X-ray diffraction analysis. One of the adducts, bis(O-butyldithiocarbonato)bis(4-cyanopyridine)nickel(II), crystallizes in the monoclinic space group P21/c with unit cell parameters : a = 12.546(4), b = 11.495(3), c = 9.351(3) A, β = 102.73(3)o, Z = 2. Crystal structure was solved by direct methods and refined by full matrix least squares procedures to a final R-value of 0.0299 for 2,788 observed reflections. The packing of layers of molecules is stabilized by weak C–H···N and C–H···π hydrogen bonds.