These compounds
are widely present in the mineral, plant and animal worlds and are
known to play many important functions in the area of analytical
chemistry, metallurgy, biological systems, industry and medicine These
•are described below:
Coordination compounds find use in many qualitative and
quantitative chemical analysis The familiar colour reactions given
by metal ions with a number of ligands (especially chelating ligands),
as a result of formation of coordination entities, form the basis for
their detection and estimation by classical and instrumental methods
of analysis Examples of such reagents include EDTA, DMG
(dimethylglyoxime), a–nitroso–b–naphthol, cupron, etc