Abstract

The preparation of new nickel (II) complexes with mixed ligands including benzilbis- (semicarbazone) - SCH₂ and one of dithiocarbamate ligands (ammonium pyrrolidenedithio- carbamate - Pyrdtc or ammonium indolinedithiocarbamate - Indtc) have been carried out in both neutral and basic medium. The resulted complexes have been characterized using elemental analysis by atomic absorption spectroscopy and by precipitation method, molar conductance measurements, refraction measurements, magnetic susceptibilities, infrared and electronic spectra. The study suggested that the above ligands formed neutral complexes having general formula [Ni(SCH₂)(L)X] or [Ni₂(SCH₂)₂(L)₂X_n] in neutral medium and [Ni(SCH)(L)] or [Ni₂(SCH)₂(L)₂] in basic medium (where SCH=deprotonated (-1H) from SCH₂ ligand; L= the ligand Pyrdtc or Indtc; X= Cl^- or NO₃^- or CH₃COO^- or SO₄^-2, n= 1 or 2). Hexacoordinated mononuclear (monomer) complexes or dimeric complexes have been investigated by this study, having octahedral geometries.