Synthesis and characterization of copper(II) complexes of 1,5-bis(quinoline-8′-yl)-1,5- dithiapentane. crystal and molecular structure of [Cu(BQDTP)(NO 3)(OH 2)](NO 3)

Abstract

Four new copper(II) complexes of formula [Cu(BQDTP)Cl 2] · 2H 2O ( I), [Cu(BQDTP)Br 2] · 2H 2O ( II), [Cu(BQDTP)(OH 2) 2] (ClO 4) 2 ( III) and [Cu(BQDTP)(NO 3) (OH 2)](NO 3) ( IV, where BQDTP is 1,5-bis(quinoline-8′-yl)-1.5-dithiapentane, have been synthesized and characterized by elemental analysis, conductivity measurements, IR and ligand-field spectral studies and magnetic susceptibility measurements. The X-ray crystal structure of IV has been solved at 293 K by single-crystal X-ray analysis. It consists of [Cu(BQDTP)(NO 3)(OH 2)] + cations and nitrate ions, which are connected by hydrogen bonds to a water molecule. The coordination geometry about the copper atom is an elongated octahedron. The measured bond distances are: CuS = 2.343(3) and 2.507(3) Å, CuN = 1.986(7) and 1.993(7) Å, CuO (water) = 2.030(6) Å and CuO )nitrate) = 2.677(7) Å. The IR and electronic spectroscopic data, conductivity and magnetic susceptibility are in agreement with the observed structure.