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Question

Chemistry Question on Chemical Reactions

The neopentyl halide in ethanol yields alkenes by E1E1 mechanism due to

A

low concentration of solvent

B

absence of base

C

it is a primary halide

D

steric factor which prevents E2 mechanism

Answer

steric factor which prevents E2 mechanism

Explanation

Solution

E1E 1 mechanism readily occur in 33^{\circ} carbocation. Presence of higher alkyl groups in alkyl halide also favours E1E 1 mechanism.

The neopentyl halide in ethanol yields alkenes by E1E 1 mechanism due to steric factor which prevents E2 mechanism. In E1E 1 mechanism, Heterolytic dissociation of alkyl halide followed by abstraction of proton by base from a CC adjacent to the positively
charged CC atom (βC(\beta-C atom )), takes place as follows: