Sulphur-ligand–metal complexes. Part 14. Bis[2-(3,3-dimethyl-2-thia-butyl)pyridine] complexes of copper(II) and related metal ions

Abstract

Complexes of the type [CuL₂X₂][L = 2-(3,3-dimethyl-2-thiabutyl)pyridine; X = Cl, Br, ClO₄, or BF₄], [CuL₂X]-BF₄(X = Cl or Br), [ML₂X₂](M = Co or Ni, X = Cl or Br), [ML₂(H₂O)(ClO₄)]ClO₄(M = Co or Ni), and [NiL₂-(H₂O)₂][ClO₄]₂ have been prepared and characterized by electronic, i.r., and e.s.r. spectroscopy. It is proposed that in the solid state all the complexes have distorted octahedral structures except [CuL₂X]BF₄ complexes which are five-co-ordinate. In methanol the [CuL₂X₂](X = Cl or Br) complexes ionize to give [CuL₂X]⁺ species whereas for X = ClO₄ and BF₄ the complexes also show evidence of ligand dissociation.