Complexes of the schiff base derived from phenylbiguanide and diacetyl monoxime with copper(II) and nickel(II)

Abstract

The imine-oxime ligand (H₂L) derived from phenyl biguanide and diacetyl monoxime forms 1:1 and 1:2 complexes with Cu(II) and only 1:2 complexes with Ni(II). In all these complexes the ligand acts in the tridentate uninegative form and is mostly protonated. Copper(II) forms complexes of the types [Cu(HLH)X]X where X = Cl^- or Br^- and [Cu(HLH)₂]X₂ where X = Cl^-, Br^-I^- or OH^- while nickel(II) forms complexes of the types [Ni(HLH)₂]X₂ where X= C1^-, Br^- or 1^- and [Ni(HL)₂]. The 1:1 complexes are square-planar while the 1:2 complexes are distorted octahedral.