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In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :
- a)One mole of NaOH and one mole of Br2.
- b)Four moles of NaOH and two moles of Br2.
- c)Two moles of NaOH and two moles of Br2.
- d)Four moles of NaOH and one mole of Br2.
Correct answer is option 'D'. Can you explain this answer?
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Answer:
The Hofmann bromamide degradation reaction is a method used to convert primary amides into primary amines. In this reaction, the amide is treated with bromine (Br2) in the presence of sodium hydroxide (NaOH) to form an isocyanate intermediate, which is then hydrolyzed to yield the primary amine.
The balanced chemical equation for the Hofmann bromamide degradation reaction is as follows:
RCONH2 + Br2 + 4NaOH → R-NH2 + Na2CO3 + 2NaBr + 2H2O
From the balanced equation, we can determine the stoichiometry of the reaction, including the number of moles of NaOH and Br2 used per mole of amine produced.
Explanation:
Step 1: Formation of isocyanate intermediate
- When the amide (RCONH2) reacts with bromine (Br2), one mole of bromine is consumed per mole of amide.
- Therefore, the number of moles of Br2 used per mole of amine produced is 1.
Step 2: Hydrolysis of isocyanate intermediate
- The isocyanate intermediate is then treated with sodium hydroxide (NaOH) to hydrolyze it and produce the primary amine (R-NH2).
- In this step, four moles of sodium hydroxide are consumed per mole of amide.
- Therefore, the number of moles of NaOH used per mole of amine produced is 4.
Overall reaction:
- Combining the stoichiometry from both steps, we can conclude that for each mole of amine produced, four moles of NaOH and one mole of Br2 are used.
- Therefore, the correct answer is option 'D': Four moles of NaOH and one mole of Br2.
Summary:
- The Hofmann bromamide degradation reaction involves the conversion of primary amides to primary amines.
- The reaction requires the use of bromine (Br2) and sodium hydroxide (NaOH).
- The stoichiometry of the reaction indicates that for each mole of amine produced, four moles of NaOH and one mole of Br2 are used.
The Hofmann bromamide degradation reaction is a method used to convert primary amides into primary amines. In this reaction, the amide is treated with bromine (Br2) in the presence of sodium hydroxide (NaOH) to form an isocyanate intermediate, which is then hydrolyzed to yield the primary amine.
The balanced chemical equation for the Hofmann bromamide degradation reaction is as follows:
RCONH2 + Br2 + 4NaOH → R-NH2 + Na2CO3 + 2NaBr + 2H2O
From the balanced equation, we can determine the stoichiometry of the reaction, including the number of moles of NaOH and Br2 used per mole of amine produced.
Explanation:
Step 1: Formation of isocyanate intermediate
- When the amide (RCONH2) reacts with bromine (Br2), one mole of bromine is consumed per mole of amide.
- Therefore, the number of moles of Br2 used per mole of amine produced is 1.
Step 2: Hydrolysis of isocyanate intermediate
- The isocyanate intermediate is then treated with sodium hydroxide (NaOH) to hydrolyze it and produce the primary amine (R-NH2).
- In this step, four moles of sodium hydroxide are consumed per mole of amide.
- Therefore, the number of moles of NaOH used per mole of amine produced is 4.
Overall reaction:
- Combining the stoichiometry from both steps, we can conclude that for each mole of amine produced, four moles of NaOH and one mole of Br2 are used.
- Therefore, the correct answer is option 'D': Four moles of NaOH and one mole of Br2.
Summary:
- The Hofmann bromamide degradation reaction involves the conversion of primary amides to primary amines.
- The reaction requires the use of bromine (Br2) and sodium hydroxide (NaOH).
- The stoichiometry of the reaction indicates that for each mole of amine produced, four moles of NaOH and one mole of Br2 are used.
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In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option 'D'. Can you explain this answer?
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In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option '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 In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option '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 In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option 'D'. Can you explain this answer?.
In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option '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 In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option '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 In the Hofmann bromamide degradation reaction, the number of moles of NaOH and Br2 used per mole of amine produced are :a)One mole of NaOH and one mole of Br2.b)Four moles of NaOH and two moles of Br2.c)Two moles of NaOH and two moles of Br2.d)Four moles of NaOH and one mole of Br2.Correct answer is option 'D'. Can you explain this answer?.
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