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NEET2005ChemistryAminesActual

Pyridine is less basic than triethylamine because

Options

  1. Apyridine has aromatic character
  2. Bnitrogen in pyridine is s p^2 hybridised
  3. Cpyridine is a cyclic system
  4. Din pyridine, lone pair of nitrogen is delocalised.

Correct answer

D. in pyridine, lone pair of nitrogen is delocalised.

Step-by-step solution

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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