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Which of the following gives Cannizzaro’s reaction?
- a)Benzaldehyde
- b)N,N -dimethyl para-aminobenzaldehyde
- c)Formaldehyde
- d)2-methylpropanal
Correct answer is option 'A,C,D'. Can you explain this answer?
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Which of the following gives Cannizzaro’s reaction? a)Benzaldehy...
The presence of electron donating group decreases the reactivity of benzaldehyde derivatives towards Cannizzaro’s reaction.
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Which of the following gives Cannizzaro’s reaction? a)Benzaldehy...
Understanding Cannizzaro's Reaction
Cannizzaro's reaction is a chemical reaction involving the disproportionation of aldehydes that do not have alpha-hydrogens. This reaction is significant in organic chemistry and helps to distinguish aldehydes based on their structure.
Key Characteristics of Cannizzaro’s Reaction
- Disproportionation: In this reaction, an aldehyde without alpha-hydrogens is converted into an alcohol and a carboxylic acid.
- Conditions: Typically occurs in the presence of a strong base, such as sodium hydroxide.
Substances That Undergo Cannizzaro's Reaction
1. Benzaldehyde (Option A):
- Lacks alpha-hydrogens.
- Undergoes Cannizzaro's reaction, yielding benzyl alcohol and benzoic acid.
2. Formaldehyde (Option C):
- Also lacks alpha-hydrogens.
- Reacts via Cannizzaro's reaction to produce methanol and formic acid.
3. 2-Methylpropanal (Option D):
- Though it has alpha-hydrogens, in certain conditions, it can still undergo a Cannizzaro reaction due to steric hindrance affecting its reactivity.
4. N,N-Dimethyl para-aminobenzaldehyde (Option B):
- This compound has alpha-hydrogens and typically does not participate in Cannizzaro's reaction, making it an exception in this list.
Conclusion
The correct options for Cannizzaro's reaction include Benzaldehyde (A), Formaldehyde (C), and 2-Methylpropanal (D), as they can undergo this reaction under the right conditions. Option N,N-Dimethyl para-aminobenzaldehyde (B) does not participate in this reaction due to the presence of alpha-hydrogens.
Cannizzaro's reaction is a chemical reaction involving the disproportionation of aldehydes that do not have alpha-hydrogens. This reaction is significant in organic chemistry and helps to distinguish aldehydes based on their structure.
Key Characteristics of Cannizzaro’s Reaction
- Disproportionation: In this reaction, an aldehyde without alpha-hydrogens is converted into an alcohol and a carboxylic acid.
- Conditions: Typically occurs in the presence of a strong base, such as sodium hydroxide.
Substances That Undergo Cannizzaro's Reaction
1. Benzaldehyde (Option A):
- Lacks alpha-hydrogens.
- Undergoes Cannizzaro's reaction, yielding benzyl alcohol and benzoic acid.
2. Formaldehyde (Option C):
- Also lacks alpha-hydrogens.
- Reacts via Cannizzaro's reaction to produce methanol and formic acid.
3. 2-Methylpropanal (Option D):
- Though it has alpha-hydrogens, in certain conditions, it can still undergo a Cannizzaro reaction due to steric hindrance affecting its reactivity.
4. N,N-Dimethyl para-aminobenzaldehyde (Option B):
- This compound has alpha-hydrogens and typically does not participate in Cannizzaro's reaction, making it an exception in this list.
Conclusion
The correct options for Cannizzaro's reaction include Benzaldehyde (A), Formaldehyde (C), and 2-Methylpropanal (D), as they can undergo this reaction under the right conditions. Option N,N-Dimethyl para-aminobenzaldehyde (B) does not participate in this reaction due to the presence of alpha-hydrogens.
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Which of the following gives Cannizzaro’s reaction? a)Benzaldehyde b)N,N -dimethyl para-aminobenzaldehyde c)Formaldehyde d)2-methylpropanalCorrect answer is option 'A,C,D'. Can you explain this answer?
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Which of the following gives Cannizzaro’s reaction? a)Benzaldehyde b)N,N -dimethyl para-aminobenzaldehyde c)Formaldehyde d)2-methylpropanalCorrect answer is option 'A,C,D'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following gives Cannizzaro’s reaction? a)Benzaldehyde b)N,N -dimethyl para-aminobenzaldehyde c)Formaldehyde d)2-methylpropanalCorrect answer is option 'A,C,D'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following gives Cannizzaro’s reaction? a)Benzaldehyde b)N,N -dimethyl para-aminobenzaldehyde c)Formaldehyde d)2-methylpropanalCorrect answer is option 'A,C,D'. Can you explain this answer?.
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