Abstract: The title mononuclear nickel and zinc complexes, Ni(C11H9N4S3)2andZn(C11H9N4S3)2.2(C3H7NO), were prepared by the reaction of Nickel(II) or Zinc(II)acetate with 1,5-bis[(2-thiophenyl)methylidene]thiocarbonohydrazide in a methanol solution. It features mono-deprotonated bis-bidentate ligands, which coordinate to metal (II) ions byhydrazylN and thiocarbonylS atoms, yielding a tetracoordinated metal ions complexes. In Ni(II) complex the geometry around the metal ion is described as square planar. In the Zn(II) the metal atom shows severely tetrahedral distortion from anideal square-planar coordination geometry, as reflected by thedihedral angle between ZnN2and ZnS2 planes of 73.03(13)°.Two intramolecularhydrogen bonds are observed between the solvate dmf molecules and the coordinated ligands:N2—H2N…O1iand N6—H6N…O2ii in this complex.
Keywords: Schiff base, Thiocarbonyl, Nickel, Zinc, tetrahedral.
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