Bromination reactions involving nickel and copper complexes of Schiff-base derivatives of acetylacetone

Abstract

Bromination, in acetonitrile or chloroform of nickel(II) and copper(II) complexes of 5,8-diazadodeca-4,8-diene-2,11-dione and the nickel(II) complex of 6-methyl-5,8-diazadodeca-4,8-diene-2,11-dione has been studied. The products obtained contain two bromine atoms per molecule of complex. The ligand can be brominated with N-bromosuccinimide in the absence of a metal ion and the product reacts with nickel(II) or copper(II) ions to yield identical complexes to those obtained when the reaction is performed on the complexes of the corresponding non-brominated ligand.