What is chlorophyll, Chemistry

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Q. What is chlorophyll?

A magnesium complex of porphyrin is called chlotophyll. the green colouring material in plants and which is essential  for photosynthesis.

Hemoglobin, plays the role of oxygen carrier in mammalian blood. In hemoglobin Fe2+ ion is not only surrounded by four nitrogens of porphyrin but the fifth position is occupied by nitrogen of the protein as shown in Fig.

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