Vinylcyclohexane, $C X_{6} H X_{11} - CH = CH X_{2}$ , reacts with HCl (no peroxide). Taking the most stable carbocation reachable by a 1,2-shift, the major product is

A1-chloro-1-ethylcyclohexane
B1-chloro-2-ethylcyclohexane
C(2-chloroethyl)cyclohexane
D(1-chloroethyl)cyclohexane

Answer: A

Protonation gives the secondary cation

C X_{6} H X_{11} - CH X^{+} - CH X_{3}

. A 1,2-hydride shift from the ring carbon attached to it gives the tertiary 1-ethylcyclohexyl cation. Chloride adds to give 1-chloro-1-ethylcyclohexane as the major product.

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Vinylcyclohexane, CX6​HX11​−CH=CHX2​, reacts with HCl (no peroxide). Taking the most stable carbocation reachable by a 1,2-shift, the major product is

Answer: A

More questions on Electrophilic addition to alkenes and Markovnikov rule

Vinylcyclohexane, $C X_{6} H X_{11} - CH = CH X_{2}$ , reacts with HCl (no peroxide). Taking the most stable carbocation reachable by a 1,2-shift, the major product is