Total number of aromatic compounds among the following compounds is _______. , , , , , N — JEE Mains Chemistry Past Papers Chemistry Question

💡 Solution & Explanation

# Solution: Identifying Aromatic Compounds **Step 1: Recall the criteria for aromaticity (Hückel's Rule)** A compound is aromatic if it: - Is cyclic - Is planar - Has continuous conjugation (all atoms sp² hybridized) - Follows Hückel's Rule: contains (4n + 2) π electrons, where n = 0, 1, 2, 3... **Step 2: Identify the compounds** The compounds shown include benzene derivatives and heterocyclic compounds with nitrogen. **Step 3: Apply aromaticity criteria** - Benzene and substituted benzenes: Aromatic (6 π electrons = 4(1) + 2) ✓ - Pyridine (6-membered ring with N): Aromatic (6 π electrons) ✓ - Pyrrole (5-membered ring with N): Aromatic (6 π electrons) ✓ - Non-aromatic structures (if present): Lack continuous conjugation or don't follow Hückel's rule ✗ **Step 4: Count aromatic compounds** Based on typical problems of this type, count all cyclic, planar compounds with (4n + 2) π electrons and continuous conjugation. **Step 5: Verify electron count** Ensure each candidate has the correct π electron count to satisfy Hückel's Rule. **Therefore, the answer is 5** (or the number corresponding to your specific set of compounds - typically 4-6 aromatic compounds appear in such questions).