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Elimination from 2 - bromobutane results in:

Correct answer: B. Predominantly 2 - butene

  • A. Equimolar mixture of 1 and 2 - butene
  • B. Predominantly 2 - butene
  • C. Predominantly 1- butane
  • D. 2 - butyne

Explanation

In this elimination reaction of alkyl halide a major product is produced according to Saytzeff's rule. This states that when two alkenes may be formed, then the alkene which is the most substituted one predominates. Therefore, predominantly (80%) 2-butene will be produced.The correct option is B.

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About Alkyl Halides

Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.

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