Indium(III) Complexes with Some Salicylidene Aromatic Schiff Bases

Article abstract of DOI:10.1007/BF00903239

In(III) complexes with salicylidene aromatic Schiff bases have been prepared.The nature of the complexes has been studied by microanalysis of the solid complexes, conductometric titration, uv and ir spectrophotometric measurements.The complexes are of the type 1:1 and 2:1 depending upon the Schiff base.The tendency of the salicylidene Schiff base molecule towards complex formation with In(III) is found to depend largely on the strength of the intramolecular hydrogen bond established between the aldehydic OH group and C=N.Furthermore, it is concludedthat these Schiff bases cordinate to In(III) as tri- or bidentate ligands depending upon the molecular structure of the Schiff base (not as monodentate ligand as previously described).The high molar absorbance of the 1:2 In(III) complex with salicylidene-o-hydroxyaniline I (17800 mol^-1cm²) can be applied for the microdetermination of small amounts of Indium as low as 0.57 μg/ml solution. - Keywords: Indium(III) complexes; Schiff bases