Spectrophotometric Determination of Co~(2+), Ni~(2+), and Cu~(2+) with a New Compartmental Hexadentate Schiff Base Ligand

摘要

Reaction between 3-formylsalicylic acid (FSA) and 4,5-dichloro-1,2-phenylenediamine (CPH), yields a hexadentate Schiff base ligand (H4fsacph) with N2O4 donor frame of which the inner compartment is N2O2 and the outer is O2,O2 type. The ligand has been identified and its molecular weight has been estimated from its mass and TGA spectra. The complexation of the ligand with three divalent transition metals; Co, Ni, and Cu, has been investigated spectrophotometrically in solution. A marked sensitivity toward the three metals has been observed as indicated from quantitative determination of these ions in high diluted solutions. The mole-ratio and slope-ratio methods showed that these complexes are 1:1 type of complexes (MH2fsacph).