Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

Question

Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces (A) 1-phenylcyclopentene (B) 3-phenylcyclopentene (C) 4-phenylcyclopentene (D) 2-phenylcyclopentene

Tardigrade Admin · Accepted Answer

Trnas-2-phenyl-1-Bromo cyclo pentane
Structure is as follows :
halo alloane treatment with dlcoholic

K O H

results in

E_{2}

anti-elimination mechanism
Anti elimination means

H

and

B r

both departing groups must be present at dihedral angle

18 0^{\circ}

(anti).

Q. Reaction of trans 2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

1-phenylcyclopentene

3-phenylcyclopentene

4-phenylcyclopentene

2-phenylcyclopentene

Trnas-2-phenyl-1-Bromo cyclo pentane Structure is as follows : halo alloane treatment with dlcoholic KOH results in E2​ anti-elimination mechanism Anti elimination means H and Br both departing groups must be present at dihedral angle 180∘ (anti).

Trnas-2-phenyl-1-Bromo cyclo pentane
Structure is as follows :
halo alloane treatment with dlcoholic $K O H$ results in
$E_{2}$ anti-elimination mechanism
Anti elimination means $H$ and $B r$ both departing groups must be present at dihedral angle $18 0^{\circ}$ (anti).