Role of coordination compounds in biological systems:

We know that photosynthesis is made possible by the presence of the chlorophyll pigment. This pigment is a coordination compound of magnesium. In the human biological system, several coordination compounds play important roles.

For example, the oxygen-carrier of blood, i.e. haemoglobin is a coordination compound of iron.

Role of coordination compounds in medicinal chemistry:

Certain coordination compounds of platinum (for example- cis-platin) are used for inhibiting the growth of tumours.

Role of coordination compounds in analytical chemistry:

During salt analysis, a number of basic radicals are detected with the help of the colour changes they exhibit with different reagents. These colour changes are a result of the coordination compounds or complexes that the basic radicals form with different ligands.