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2-bromopentane is heated with potassium ...

2-bromopentane is heated with potassium hydroxide in ethanol. The major product obtained is- pent-1-ene 2-ethoxypentane trans-2-pentene cis-2-pentene

A

pentene-1

B

2-ethoxypentane

C

trans-pentene-2

D

cis-pentene-2

Text Solution

Verified by Experts

The correct Answer is:
C
Secondary alkyl halides on treatment with alcoholic KOH-preferably undergo elimination rather than substitution to give alkenes in accordance with Saytzeffrule. Usually the more stable trans-alkenes predominate in this reaction. Thus, 2-bromopentane gives trans-pentene-2
`CH_(3) - underset(Br)underset(|)CH-CH_(2)CH_(2)CH_(3) overset(KOH "alc")underset(Delta) to`
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