Assertion : 2-bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product.…

Assertion : 2-bromobutane on reaction with sodium ethoxide in ethanol gives 1-butene as a major product. Reason : 1-butene is more stable than 2-butene.
  1. If both assertion and reason are true and reason is the correct explanation of assertion
  2. If both assertion and reason are true but reason is not the correct explanation of assertion
  3. If assertion is true but reason is false
  4. If both assertion and reason are false.

Solution

2-bromobutane on reaction with sodium ethoxide in ethanol gives 2-butene as a major product. This is according to Saytzeff's rule i.e. the predominant product is the most substituted alkene. 2-butene is more stable than 1-butene due to presence of large number of hyperconjugating structures in 2-butene.

Asked in: NEET 2009 (Mains)

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