Which is correct w.r.t. (A) and (B)?

  • Option 1)

    Rate of E2 reaction will be slower for B.

  • Option 2)

    Rate of E2 reaction will be slower for A.

  • Option 3)

    Rate of E1 reaction will be different for A and B.

  • Option 4)

    Rate of E1 reaction will be more for A in comparison to B.

 

Answers (1)

As we learnt in

Reaction of alkyl halide with KOH (alc) -

\beta- elimination reaction take place and produces alkenes.

- wherein

CH3CH2Br + KOH (alc.) \rightarrow H2C=CH2 + KBr + H2O

 

 E- reaction show isotopic effect.

C-D bond strength is greater than C-H bond strength. Hence, E2 reaction for B will be slower.


Option 1)

Rate of E2 reaction will be slower for B.

This option is correct

Option 2)

Rate of E2 reaction will be slower for A.

This option is incorrect

Option 3)

Rate of E1 reaction will be different for A and B.

This option is incorrect

Option 4)

Rate of E1 reaction will be more for A in comparison to B.

This option is incorrect

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