Complexes of nickel(II) halides with polymethylenebis(phenylthiourea) compounds

Abstract

The complexing behaviour of polymethylenebis(phenylthiourea) compounds, PhNH·CS·NH·[CH₂]_n·NH·CS·NHPh (L, n= 2–10), towards Ni^II halides has been investigated. These new bidentate ligands give a great variety of stereochemistries with Ni^II. Electronic spectra, molecular weights, and conductivity values have been measured to elucidate the stereochemistry of the complexes obtained. The following complexes have been identified : [NiLX₂](X = Cl, Br, or I)(tetrahedral, monomeric, paramagnetic, chromophore NiS₂X₂); [NiLX₂](tetrahedral, polymeric, paramagnetic, chromophore NiS₂X₂); [NiL₂X₂](tetragonal, monomeric, paramagnetic, chromophore NiS₄X₂); and [NiL₂X₂](square planar, polymeric, diamagnetic, chromophore NiS₄).