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Dehydrohalogenation involves removal of ...

Dehydrohalogenation involves removal of the halogenn atom together with a hydrogen atom from carbon adjacent to the one with halogen atom. Alcoholic KOH is used for dehydrohalogenation. According to saytzeff's rule, when two alkenes may be formed, the alkene which is most substituted is the major product.
Q. Arrange the following alkyl halides in decreasing order of the rate of `beta`-elimination reaction with alcoholik KOH.
`underset((i))(CH_(3)CH_(2)CH_(2)Br) underset((ii))(CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)Br) underset((iii))(CH_(3)-CH_(2)-underset(Br)underset(|)(C)H-CH_(3))`

A

iigtiiigti

B

iiigtiigti

C

igtiigtiii

D

iigtigtiii

Text Solution

Verified by Experts

The correct Answer is:
B
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Arrange the following alkyl halides in decreasing order of the rate of beta -elimination reaction with alcoholic KOH. (I) CH_(3)-underset(CH_(3))underset(|)overset(H)overset(|)(C)-CH_(3)Br (II) CH_(3)-CH_(2)-Br (III) CH_(3)-CH_(2)-CH_(2)-Br

Arrange the following alkyl halides in decreasing order of the rate or beta -elimination reaction alcoholic KOH. A. CH_(3)-underset(CH_(3))underset(|)overset(H)overset(|)(C)-CH_(2)Br B. CH_(3)-CH_(2)-Br C. CH_(3)-CH_(2)-CH_(2)-Br

CH_(3)-CH_(2)-CH_(2)-underset(OH)underset(|)(C )H-CH_(3) and CH_(3)-CH_(2)-underset(OH)underset(|)(C )H-CH_(2)-CH_(2)-CH_(3) are

CH_(3)-underset(Cl)underset(|)(C )H-underset(I)underset(|)(C )H-CH_(3) CH_(3)-underset(CH_(3))underset(|)(C)H-(CH_(2))_(4)-underset(CH_(3))underset(|)(C )H-underset(Br)underset(|)(C )H-CH_(2)CH_(3)

CH_(3)CH=CH-CH_(3) + Br_(2) to CH_(3)-underset(Br)underset(|)(C )H-underset(Br)underset(|)(C )H-CH_(3) is an

Given the IUPAC of the following alkanes: (i) CH_(3) - underset(CH_(3))underset(|)underset(CH_(2))underset(|)(C )H-CH_(2)-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C )-CH_(3)

Give IUPAC name of: (i) CH_(3)-CH_(2)-underset(CH_(3))underset(|)underset(CH_(2))underset(|)(C )H-underset(CH_(3))underset(|)overset(CH_(3))overset(|)(C )-CH_(2)-OH_(3)

Write the IUPAC name of CH_3 - underset(Br) underset(|) (CH) - CH_2 - underset(Cl) underset(|)(CH) - CH_3

Correct name for the given compound CH_(3)-CH_(2)-underset(CH_(2)CH_(3))underset(|)(C)H-CH_(2)-underset(CH_(3))underset(|)(C)H-CH_(2)-CH_(3) is

Arrange the following compounds in order of ease of dehydrohalogenation by concentrated alcoholic KOH A) CH_(3)underset(CH_(3))underset(|)(C)HCH_(2)CH_(2)Br B) CH_(3)CH_(2)underset(CH_(3))underset(|)overset(Br)overset(|)(C)CH_(3) C) CH_(3)underset(CH_(3))underset(|)(C)Hoverset(Br)overset(|)(C)HCH_(3)

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