Question

Write examples of coordination metal complexes in biology.

Answer 1

• Haemoglobin: It is a coordination compound that contains an Fe²⁺ ion coordinated to a porphyrin ring.
• Chlorophyll: It is a plant pigment that contains a Mg²⁺ ion coordinated to the porphyrin ring.
• Vitamin B₁₂: It is a complex molecule that contains a Co³⁺ ion as the central metal ion.