Synthesis and Characterisation of Some Mixed Ligand Complexes Derived from 5-Sulphosalicylic Acid, Diethylenetriamine and Nickel(II) or Copper(II)

Abstract

The synthesis and physico-chemical characterisation of Cu(II) and Ni(II) complexes with 5-sulphosalicylic acid (SA) and diethylenetriamine (trien) are reported. The reaction mixtures of metal ions, SA and trien in dimethylformamide (DMF) in different stoichiometric ratios and refluxed for several hours gave the following complexes: Cu[Cu(SA) (H₂O)₄]₂.8H₂O (I), Cu[Cu(trien)-(SA)H₂O]₂.6H₂O (II), [Cu(trien) (H₂O)₃] [Cu(trien) (SA)H₂O]₂. 7H₂O (III), [Cu(trien)₂] [Cu(trien) (SA)H₂O]₂.10H₂O (IV), Ni[Ni(SA) (H₂O)₄]₂.-8H₂O (V), Ni[Ni(trien) (SA)H₂O]₂.9H₂O (VI), [Ni(trien) (H₂O)₃] [Ni-(trien) (SA)H₂O]₂.5H₂O (VII) and Ni[Cu (SA) (H₂O)₄]₂.8H₂O (VIII) (after crystallization in water). The solid complexes were characterized on the basis of elemental analyses, conductivity and infrared spectral studies.