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Question: Answered & Verified by Expert
Pyridine is less basic than triethylamine because
ChemistryAminesAIIMSAIIMS 2005
Options:
  • A pyridine has aromatic character
  • B nitrogen in pyridine is $s p^2$ hybridised
  • C pyridine is a cyclic system
  • D in pyridine, lone pair of nitrogen is delocalised.
Solution:
1727 Upvotes Verified Answer
The correct answer is: in pyridine, lone pair of nitrogen is delocalised.
Basicity of amines is due to availability of an unshared pair (lone pair) of electrons on nitrogen.
This lone pair of electrons is available for the formation of a new bond with a proton or Lewis acid. Pyridine is less basic than triethylamine because lone pair of nitrogen in pyridine is delocalised.

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