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  4. Neopentyl bromide undergoes dehydro halogenation to give alkene even though it has no β text- hydrogen. This is due to

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Q. Neopentyl bromide undergoes dehydro halogenation to give alkene even though it has no $ \beta \text{-} $ hydrogen. This is due to

CMC MedicalCMC Medical 2008

Solution:

Neopentyl bromide undergoes dehydro-halogenation to give alkene even though it has no $ \beta \text{-} $ hydrogen atom. This is due to rearrangement of carbocation by $ {{E}_{1}} $ mechanism. $ C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{\mathbf{|}}{\overset{\mathbf{|}}{\mathop{C}}}\,}}}\,-C{{H}_{2}}Br\xrightarrow[-B{{r}^{-}}]{} $

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