Question

Which of the following compound(s) will undergo Ei elimination reaction?

• A. Only III
• B. Only (I) and (III)
• C. Only (I) and (II)
• D. (I), (II) and (III)

Answer 1

The correct option is C Only (I) and (II)

Generally esters, xanthates and amino oxides undergo Ei elimination reaction if they have at least one $\beta$-hydrogen atom with repect to the leaving group.
Generally, Ei elimination occurs in the presence of heat only, no reagent required.

Among the given compounds only (I) and (II) have beta hydrogen with respect to leaving group. Hence, only (I) and (II) shows Ei elimination reaction.

Due to absence beta hydrogen, (III) does not show Ei elimination reaction.