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MHT CET202013 Oct 2020Morning ShiftChemistryChemical KineticsActual

The highest peak in energy profile diagram for mechanism of alkaline hydrolysis of tertiary butyl bromide represents

Options

  1. Atransition state of 1^ st step
  2. Bformation of carbocation
  3. Ctransition state of 2^ nd step
  4. Dproducts

Correct answer

A. transition state of 1^ st step

Step-by-step solution

The alkaline hydrolysis to tert-butyl bromide with aqueous alkali such as NaOH or KOH is as follows. The rate of this reaction depends only on the concentration of the tert-butyl bromide and is independent of the concentration of alkali added. Rate [ ( CH ₃ )₃ C - Br ] Rate = K [ ( CH ₃ )₃ C - Br ] This is a first order reaction because rate of hydrolysis of ( CH ₃ )₃- Br is independent of the concentration of alkali or OH ⁻ ions. This can be explained by two-step mechanism shown below. Each step is an elementary r

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