Electronic spectra and structures of some benzothiazole complexes of iron(II), cobalt(II), and nickel(II)

Abstract

The preparations and electronic spectra are reported for the compounds ML₂X₂(L = benzothiazole; M = Fe, X = Cl or Br; M = Co or Ni, X = Cl, Br, or l); ML₄X₂(M = Fe or Ni, X = Br; M = Co, X = ClO₄); and NiL₂(NCS)₂ and its acetone solvate. The cobalt complexes, FeL₂Br₂, and NiL₂I₂ have tetrahedral structures, while the other compounds are essentially octahedral. The benzimidazole analogues of the thiocyanate complexes are also described.