| Assertion: Vinylic halides are highly reactive towards nucleophilic substitution reactions. |
| Reason: Reactivity is due to the polarity of carbon-halogen bond. |
A) Assertion and reason both are correct statements and reason is correct explanation for assertion.
B) Assertion and reason both are correct statements but reason is not correct explanation for assertion.
C) Assertion is correct statement but reason is wrong statement.
D) Assertion is wrong statement but reason is correct statement.
Correct Answer: D
Solution :
Vinylic halides are very less reactive towards nucleophilic substitution reactions because of resonance effect. Resonance gives rise to partial double bond character to the carbon-halogen bond making it stronger and therefore more difficult to cleave than a \[Cs{{p}^{3}}\]- X bond. It also reduces the polarity of the carbon-halogen bond thereby making heterolysis difficult.
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