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 [CuL,X,] [L = 2-(3,3-dimethyl-2-thiabutyl)pyridine; X = CI, Br, C104, or BF4], [CuL2X]-BF4(X = CI or Br), [ML,X2] (M = Co or Ni, X = CI or Br), [ML2(H20)(C104)]CI04 (M = Co or Ni), and [NiL2-( H20),] [C104], 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 = CI or Br) complexes ionize to give [CuL2X]+ species whereas for X = C104 and BF,, the complexes also show evidence of ligand dissociation.