Studies Of Aluminium Complexes Of Some Model Biological Ligands

ABSTRACT

Complexes of Aluminium with some model bioligands, were prepared

and characterized by elemental analysis, melting point, conductivity, solubility

and infra-red spectroscopic studies.

The complexes are soluble in water and some organic solvents such as

chloroform, ethanol and methanol. The melting point ranges from 258°C -

282°C for complexes with Al Cl3, and 8Ql C - 95 C, for complexes with

AlNH4(S04) 2 .12H2 0. Conductivity studies reveals that the prepared

· complexes are non-electrolyte in water.

The Infrared data reveals that Citrate, Succinate, Malonate and

Glutarate, co-ordinate via the carboxylate group. Catechol coordinates via

the oxygen atom. Guanine co-ordinates via the carbonyl oxygen, while

coordination of glycine is through the carboxylate oxygen and amino nitrogen.

Thus, catechol, Succinate, Guanine, malonate,glutarate, and glycine act as

bidentate ligands while Citrate serves as tridentate ligand.

The sulphate and chloride anions are coordinated to the metal in some

of the complexes.