Which of the following will most readily give the dehydrohalogenation product ?

Question

Which of the following will most readily give the dehydrohalogenation product ? (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

In dehydrohalogenation of alkenes, the reaction proceeds by E1CB mechanism: <img class="img-fluid question-image" alt="image" src="https://cdn.tardigrade.in/img/question/chemistry/28f0a7e8b65588118ee74cdd8eae95d8-.png" /> The benzyl carbanion is more stable than vinyl carbanion due to resonance. So, the carbanion become more stable in the transition state, and the alkyne is formed.

Q. Which of the following will most readily give the dehydrohalogenation product ?

In dehydrohalogenation of alkenes, the reaction proceeds by E1CB mechanism:

The benzyl carbanion is more stable than vinyl carbanion due to resonance. So, the carbanion become more stable in the transition state, and the alkyne is formed.

Q. Which of the following will most readily give the dehydrohalogenation product ?

In dehydrohalogenation of alkenes, the reaction proceeds by E1CB mechanism: The benzyl carbanion is more stable than vinyl carbanion due to resonance. So, the carbanion become more stable in the transition state, and the alkyne is formed.

In dehydrohalogenation of alkenes, the reaction proceeds by E1CB mechanism:

The benzyl carbanion is more stable than vinyl carbanion due to resonance. So, the carbanion become more stable in the transition state, and the alkyne is formed.