Question

An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options.

Assertion : Vinly halides do not undergo nucleophilic substitution easily.

Reason : Even though the intermediate carbocation is stabilized by loosely held $\pi$-electrons, the cleavage is difficult because of strong bonding.

• A. Both (A) and (R) are wrong statements
• B. Both (A) and (R) are correct statements and (R) is the correct explanation of (A)
• C. Both (A) and (R) are correct statements but (R) is not the correct explanation of (A)
• D. (A) is a correct statement but (R) is a wrong statement.

Answer 1

The correct option is D (A) is a correct statement but (R) is a wrong statement.

Vinyl halide $C{H}_2=CH-CI$ do not undergo SN reaction

This is due to formation of highly unstable carbocation $(CH{)}_2=\stackrel{\oplus }{C}H$; which cannot be delocalised by the $\pi -electrons$, also $C-CI$ has double bond character be