Which one of the following alkenes will react fastest with H2 under catalytic hydrogenation condition?
Correct answer: A. Option A
- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation
The rate of Hydrogenation of an alkene decreases with increasing alkyl substitution on C = C.21. Choices (C) and (D) are ruled out due to steric hindrance (as the number of R groups is more). Among (A) and (B) two alkyl groups on the same carbon atom offer more steric hindrance than alkyl groups on two separate carbon atoms.
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About Chemistry of Hydrocarbons
Hydrocarbons are studied through the structures and reactions of alkanes, alkenes, alkynes and aromatic compounds. Coverage includes free radical substitution in alkanes, electrophilic addition to carbon-carbon multiple bonds, benzene substitution, aromatic stability and the difference between addition reactions of alkenes and substitution reactions of benzene.
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