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Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:
- a)Both require same amount
- b)Acetylation with acetyl chloride requires more amount
- c)Acetylation with acetic anhydride requires more amount
- d)Nothing is definite
Correct answer is option 'C'. Can you explain this answer?
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Which of the following statement is true regarding amount of AlCl3 req...
Acetylation in Friedel-Craft Reaction: Amount of AlCl3 Required
The Friedel-Craft acetylation is a commonly used organic reaction to introduce an acetyl group (CH3CO-) onto an aromatic ring. This reaction is catalyzed by a Lewis acid, typically aluminum chloride (AlCl3), and can be performed using either acetyl chloride or acetic anhydride as the acetylating agent.
Statement: Acetylation with acetic anhydride requires more amount of AlCl3 as compared to acetylation with acetyl chloride.
Explanation:
1. Friedel-Craft Acetylation Reaction:
In the Friedel-Craft acetylation reaction, the acylating agent (acetyl chloride or acetic anhydride) reacts with the Lewis acid catalyst (AlCl3) to form an acylium ion. This acylium ion then undergoes electrophilic substitution with the aromatic compound, resulting in the introduction of the acetyl group onto the aromatic ring.
2. Role of AlCl3:
Aluminum chloride (AlCl3) acts as a Lewis acid catalyst in the Friedel-Craft acetylation reaction. It activates the acylating agent by forming a complex with it, making it more reactive and facilitating the electrophilic attack on the aromatic ring.
3. Difference in Reactivity:
Acetyl chloride (CH3COCl) is more reactive than acetic anhydride (CH3CO)2O due to the presence of the highly polarized Cl-C bond. This polarization enhances the electrophilicity of the carbonyl carbon, making acetyl chloride a stronger electrophile compared to acetic anhydride.
4. Effect on Amount of AlCl3:
Since acetyl chloride is more reactive, it requires less activation energy for the reaction to proceed. Therefore, a smaller amount of AlCl3 is sufficient to catalyze the reaction between acetyl chloride and the aromatic compound.
On the other hand, acetic anhydride is less reactive, requiring more activation energy for the reaction to occur. Consequently, a larger amount of AlCl3 is needed to catalyze the reaction between acetic anhydride and the aromatic compound.
Conclusion:
Based on the reactivity differences between acetyl chloride and acetic anhydride, it can be concluded that acetylation with acetic anhydride requires a greater amount of AlCl3 catalyst compared to acetylation with acetyl chloride. Therefore, option 'C' is the correct answer.
The Friedel-Craft acetylation is a commonly used organic reaction to introduce an acetyl group (CH3CO-) onto an aromatic ring. This reaction is catalyzed by a Lewis acid, typically aluminum chloride (AlCl3), and can be performed using either acetyl chloride or acetic anhydride as the acetylating agent.
Statement: Acetylation with acetic anhydride requires more amount of AlCl3 as compared to acetylation with acetyl chloride.
Explanation:
1. Friedel-Craft Acetylation Reaction:
In the Friedel-Craft acetylation reaction, the acylating agent (acetyl chloride or acetic anhydride) reacts with the Lewis acid catalyst (AlCl3) to form an acylium ion. This acylium ion then undergoes electrophilic substitution with the aromatic compound, resulting in the introduction of the acetyl group onto the aromatic ring.
2. Role of AlCl3:
Aluminum chloride (AlCl3) acts as a Lewis acid catalyst in the Friedel-Craft acetylation reaction. It activates the acylating agent by forming a complex with it, making it more reactive and facilitating the electrophilic attack on the aromatic ring.
3. Difference in Reactivity:
Acetyl chloride (CH3COCl) is more reactive than acetic anhydride (CH3CO)2O due to the presence of the highly polarized Cl-C bond. This polarization enhances the electrophilicity of the carbonyl carbon, making acetyl chloride a stronger electrophile compared to acetic anhydride.
4. Effect on Amount of AlCl3:
Since acetyl chloride is more reactive, it requires less activation energy for the reaction to proceed. Therefore, a smaller amount of AlCl3 is sufficient to catalyze the reaction between acetyl chloride and the aromatic compound.
On the other hand, acetic anhydride is less reactive, requiring more activation energy for the reaction to occur. Consequently, a larger amount of AlCl3 is needed to catalyze the reaction between acetic anhydride and the aromatic compound.
Conclusion:
Based on the reactivity differences between acetyl chloride and acetic anhydride, it can be concluded that acetylation with acetic anhydride requires a greater amount of AlCl3 catalyst compared to acetylation with acetyl chloride. Therefore, option 'C' is the correct answer.
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Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer?
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Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer?.
Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? for Chemistry 2024 is part of Chemistry preparation. The Question and answers have been prepared according to the Chemistry exam syllabus. Information about Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Chemistry 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer?.
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Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of Which of the following statement is true regarding amount of AlCl3 required during Friedel-Craft acetylation using acetyl chloride or acetic anhydride:a)Both require same amountb)Acetylation with acetyl chloride requires more amountc)Acetylation with acetic anhydride requires more amountd)Nothing is definiteCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an
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