Effect of halogenation features on the stability of Zinc(II) complexes with monoiodo- and dibromodipyrromethenes

The complex formation of zinc(II) acetate with monoiodo- and dibromo-substituted dipyrromethenes in DMF at 298.15 K were studied by means of spectrophotometric titration. It was found that the process involves consecutive formation of heteroligand [ZnLOAc] and homoligand [ZnL2] complexes. The thermodynamic stability of halogenated zinc(II) dipyrrolylmethenates [ZnL2] was studied.