Multiple Choice
In the context of organic chemistry reactions, why are there fewer intermediates than reactants?
3. Acids and Bases
Organic Chemistry Reactions
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Which of the following reactions is an example of a Diels-Alder reaction?
A
Cycloaddition of 1,3-butadiene with ethene
B
Esterification of acetic acid with ethanol
C
Nitration of benzene
D
Hydroboration-oxidation of an alkene
Verified step by step guidance1
Identify the Diels-Alder reaction: It is a [4+2] cycloaddition reaction between a conjugated diene and a dienophile, resulting in the formation of a six-membered ring.
Examine the first option: Cycloaddition of 1,3-butadiene with ethene. 1,3-butadiene is a conjugated diene, and ethene acts as a dienophile, making this a classic example of a Diels-Alder reaction.
Consider the second option: Esterification of acetic acid with ethanol. This is a reaction between an acid and an alcohol to form an ester, not a Diels-Alder reaction.
Evaluate the third option: Nitration of benzene. This involves the substitution of a hydrogen atom on benzene with a nitro group, which is an electrophilic aromatic substitution, not a Diels-Alder reaction.
Review the fourth option: Hydroboration-oxidation of an alkene. This is a two-step reaction involving the addition of borane to an alkene followed by oxidation, not a Diels-Alder reaction.
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