Trifluoroacetate complexes of cobalt(II), nickel(II), and copper(II) with pyridine-type ligands. Part II. Preparation, vibrational and electronic spectral properties of cobalt(II) and nickel(II) complexes

Abstract

Pyridine, β- and γ-picoline, and β- and γ-ethylpyridine complexes of cobalt(II) and nickel(II) trifluoroacetates have been prepared and fully characterised by spectroscopic methods. All the complexes in the solid state were octahedral and of stoicheiometry ML_xT₂, where L = pyridine-type ligand, T = CF₃CO₂ and x= 2 or 4, with the CF₃CO₂ group being either mono- or bi-dentate. Definitive distinction between these two modes of co-ordination was sought by vibrational and electronic spectroscopy.