Question

Alkyl halides reactivity order in unimolecular elimination reactions $\left(E_1\right)$ is:

• A. $1^o>2^o>3^o$
• B. $2^o>1^o>3^o$
• C. $1^o<2^o<3^o$
• D. $2^o<1^o<3^o$

Answer 1

The correct option is C $1^o<2^o<3^o$

The correct order will be-$3^0>2^0>1^0$. E1 This is due to the stability of carbocation phenomena of hyperconjugation, which allows a nearby C-C or C-H bond to interact with the p orbital of the carbon to bring the electrons down to a lower energy state.