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Which of the following is true about Osazone formation in carbohydrates?
- a)It involve 5-membered transition state
- b)It involve 6-membered transition state
- c)It does not involve any transition state
- d)2 equivalents of PhNHNH2 are required for Osazone formation.
Correct answer is option 'B'. Can you explain this answer?
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Which of the following is true about Osazone formation in carbohydrate...
Osazone Formation in Carbohydrates
Osazone formation is a chemical reaction that is used to identify and characterize carbohydrates. It involves the reaction of a reducing sugar with excess phenylhydrazine in the presence of an acid catalyst to form a crystalline derivative known as an osazone. The reaction is specific for reducing sugars, which are those that have a free or potentially free carbonyl group, such as glucose, fructose, and maltose.
6-Membered Transition State
The mechanism of osazone formation involves a six-membered transition state in which the phenylhydrazine reacts with the carbonyl group of the sugar to form a hydrazone intermediate. The acid catalyst then protonates the hydrazone to facilitate the elimination of water and the formation of the osazone.
2 Equivalents of PhNHNH2 are Required
The reaction requires the use of excess phenylhydrazine, typically two equivalents, to ensure that all of the carbonyl groups are reacted. The reaction can be carried out in either acidic or basic conditions, although acidic conditions are more commonly used.
Applications
Osazone formation is a useful tool in carbohydrate chemistry because it allows for the identification and differentiation of different types of sugars based on the structure of their osazone derivatives. The size, shape, and composition of the osazone crystals can be used to identify the specific sugar that was used in the reaction. This technique has been used extensively in the past to identify and characterize various types of sugars, including those found in natural products and human physiology.
Osazone formation is a chemical reaction that is used to identify and characterize carbohydrates. It involves the reaction of a reducing sugar with excess phenylhydrazine in the presence of an acid catalyst to form a crystalline derivative known as an osazone. The reaction is specific for reducing sugars, which are those that have a free or potentially free carbonyl group, such as glucose, fructose, and maltose.
6-Membered Transition State
The mechanism of osazone formation involves a six-membered transition state in which the phenylhydrazine reacts with the carbonyl group of the sugar to form a hydrazone intermediate. The acid catalyst then protonates the hydrazone to facilitate the elimination of water and the formation of the osazone.
2 Equivalents of PhNHNH2 are Required
The reaction requires the use of excess phenylhydrazine, typically two equivalents, to ensure that all of the carbonyl groups are reacted. The reaction can be carried out in either acidic or basic conditions, although acidic conditions are more commonly used.
Applications
Osazone formation is a useful tool in carbohydrate chemistry because it allows for the identification and differentiation of different types of sugars based on the structure of their osazone derivatives. The size, shape, and composition of the osazone crystals can be used to identify the specific sugar that was used in the reaction. This technique has been used extensively in the past to identify and characterize various types of sugars, including those found in natural products and human physiology.
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Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer?
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Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. 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 is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. 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 is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer?.
Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. 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 is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. 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 is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer?.
Solutions for Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Chemistry.
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Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer?, a detailed solution for Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer? has been provided alongside types of Which of the following is true about Osazone formation in carbohydrates?a)It involve 5-membered transition stateb)It involve 6-membered transition statec)It does not involve any transition stated)2 equivalents of PhNHNH2 are required for Osazone formation.Correct answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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