Reaction of indium(III) and gallium(III) halides with transition-metal ion Schiff-base complexes

Abstract

The planar transition-metal chelates NN′-ethylenebis(salicylideneaminato)metal(II)[M″(saen)] where the metal ion is cobalt(II), nickel(II), or copper(II) react with the halides InX₃(where X = Cl or Br) to form 1 : 1 adducts in which planarity about the transition metal is retained. Structures are suggested for these adducts. The reaction of Ni^II(saen) with the halides GaX₃(where X = Cl or Br) results in the formation of a 1 : 1 adduct whose structure, it is suggested, is best represented as GaX₂[Ni^II(saen)]₂⁺GaCl₄. The reaction of indium(III) and gallium(III) halides with Fe^III(saen)₂O in the majority of cases leads to products arising from halide exchange reactions However, in the reaction of InBr₃ with Fe^III(saen)₂O a product formulated as Fe^III(saen)OlnBr₂ has been isolated.