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Dehydrohalogenation for Alkenes

Number of alk...

Question

Number of alkenes (be sure to consider the stereochemistry of the alkene) which can be hydrogenated to form methyl cyclohexane are_________.

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Solution

Total 6 alkenes are possible (including stereoisomers) which can be hydrogenated to form methyl cyclohexane.

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Similar questions

Q. The number of alkenes (consider stereochemistry of the alkene too) that can be hydrogenated to form methyl cyclohexane is :

Q. A hydrocarbon with molecular formula

C_{6} H_{12}

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A - D

and all on hydrogenation yield the same methyl cyclopentane Also

C

is the only one that can be resolved into enantiomers The heat of hydrogenation of

A, B

D

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B < D < A

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D

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Q. As a method for the preparation of alkenes, a weakness in the acid-catalyzed dehydration of alcohols is that the initially formed alkenes (or mixture of alkenes) sometimes isomerizes under the condition of its formation. Write a stepwise mechanism showing how 2-methyl-1-butene might isomerize to 2-methyl-2-butene in the presence of sulphuric acid.

Q. Consider the addition of

H B r

to 3,3-dimethylbut-1-ene as shown below :

Which of the following represents correct mechanistic explanation for the formation of above product?

Q. An alkyl chloride produces a single alkene on reaction with sodium ethoxide and ethanol. The alkene further undergoes hydrogenation to yield 2- methyl butane. Identify the alkyl chloride from amongst the following.

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Dehydrohalogenation for Alkenes

Standard XII Chemistry

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