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Grade: 12th

                        

How to know whether lone pair of nitrogen will participate in resonance or not even when a conjugated system is present?

6 months ago

Answers : (2)

Arun
24742 Points
							
If the nitrogen is in a double bond, then the lone pair is in one sp2 orbital, 1 electron is in the p-orbital and 1 electron is in each of the 2 remaining sp2 orbitals. If the nitrogen is not in a double bond, then the lone pair is in a p-orbital and 1 electron is in each of the 3 sp2 orbitals.
6 months ago
Vikas TU
12278 Points
							

The π-bond - π-bond conjugation is better than π-bond - lone pair conjugation.

In case of Pyridine, The π-bonds are in conjugation and forms aromatic configuration. So, the lone pair of Nitrogen do not participate in conjugation and is localised.

6 months ago
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