Chemistry A-Level
porphyrin ring
What porphyrin ring means in Chemistry A-Level, as defined for AQA.
Definition of porphyrin ring
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Reference: AQA
The multidentate ligand that donates four lone pairs from four nitrogen atoms and occupies four of the six co-ordination sites, all in one plane.
Topics that use porphyrin ring
- Substitution reactions (A-level only) (AQA A-Level)
Related terms
- chelate effect
- haemoglobin structure
- increase in particles
- multidentate substitution
- unchanged co-ordination number
- iron(II) complex
- multidentate ligand
Using porphyrin ring in the exam
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