In chlorophyll structure four pyrrole rings are united with Mg by their atoms of
Nitrogen
Carbon
Hydrogen
Oxygen
As we learn
Structure of chlorophylls -
Consists of a head called porphyrin (four pyrrole rings) and a tail called phytol (long alcohol chain). At the centre of porphyrin, a magnesium atom is present, held by nitrogen atoms of pyrrole rings.
- wherein
Molecular formula of Chlorophyll a: