Q65 / 200 · NEET 2021 · Chemistry

The major product formed in the dehydrohalogenation reaction of 2 -Bromopentane is Pent 2-ene. This product formation is based on?

  • Correct answer
    A
    Saytzeff's Rule
  • B
    Hund's Rule
  • C
    Hofmann Rule
  • D
    Huckel's Rule

Solution

2 -bromopentane gives 2 -pentene as the major product according to Saytzeff's rule as it is more substituted alkene

CH3-CHBr-CH2-CH2-CH3→alc.KOHCH2=CH-CH2-CH2-CH3                                                                (Hofmann product, least substituted alkene)

CH3-CHBr-CH2-CH2-CH3→alc.KOHCH3-CH=CH-CH2-CH3                                                        (Satzeff's product,  more substituted alkene)

Hence, the correct answer is option: 'A'.

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