Question

Write a note on porphyrins.

Answer 1

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any of a class of pigments whose molecules contain a flat ring of four linked heterocyclic groups, sometimes with a central metal atom.

Porphyrins are a group of heterocyclic macrocycle organic compounds, composed of four modified pyrrole subunits interconnected at their α carbon atoms via methine bridges. The parent porphyrin is porphine, a rare chemical compound of exclusively theoretical interest. Substituted porphines are called porphyrins

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Answer 2

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Write a note on porphyrins.

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Porphyrin head:

• All chlorophylls have a complex ring structure chemically related to the porphyrin-like groups found in haemoglobin and cytochromes.
• Site of the electrons rearrangements when the chlorophyll is excited.
• A cyclic tetrapyrrolic structure with non-ionic magnesium atom