5 Questions
What is the role of the lone pair of electrons on the nitrogen atom in pyridine?
It is directed away from the ring and is not involved in the aromatic π-electron system.
What is the structure of pyridine?
The ring nitrogen is sp2 hybridized with a lone pair in a p-orbital within the ring plane.
Where does pyridine occur in nature?
In coal-tar
What can be derived theoretically from benzene by replacing a methine group with a nitrogen atom?
Pyridine
Which type of hybridization does the ring nitrogen have in pyridine?
sp3 hybridization
Study Notes
Pyridine Structure and Properties
- The lone pair of electrons on the nitrogen atom in pyridine is involved in the π-bonding system, contributing to the aromaticity of the ring.
- Pyridine has a planar, hexagonal ring structure, similar to benzene, with a nitrogen atom replacing one of the carbon atoms.
Occurrence and Derivatives
- Pyridine occurs naturally in certain plants and is also found in tobacco smoke and coffee.
- Pyridine can be derived theoretically from benzene by replacing a methine group (CH) with a nitrogen atom.
Nitrogen Hybridization
- The ring nitrogen in pyridine exhibits sp2 hybridization.
Test your knowledge on six-membered heterocyclic rings with a focus on pyridine and its derivatives. Learn about the theoretical derivation of pyridine from benzene and the wide distribution of compounds containing the pyridine ring in nature.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
