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On oxidation with alkaline KMnO4 followed by acidification of the reaction mixture, which one of the following alcohols would produce an acid having three structural isomers?
- a)Propanol
- b)Butanol
- c)Pentanol
- d)Hexanol
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
On oxidation with alkaline KMnO4 followed by acidification of the reac...
Oxidation of alcohols with alkaline KMnO4 followed by acidification of the reaction mixture produces carboxylic acids. The number of structural isomers of the acid produced depends on the number of carbon atoms in the starting alcohol.
The correct answer is option C, pentanol, which has five carbon atoms.
Explanation:
1. Oxidation with alkaline KMnO4:
Alkaline KMnO4 is a strong oxidizing agent that converts primary and secondary alcohols to carboxylic acids. The reaction involves the oxidation of the alcohol to an aldehyde, which is further oxidized to a carboxylic acid.
2. Acidification of the reaction mixture:
The reaction mixture is then acidified to neutralize the excess KMnO4 and protonate the carboxylic acid product.
3. Structural isomers of carboxylic acids:
The number of structural isomers of a carboxylic acid depends on the number of carbon atoms in the starting alcohol.
- Methanol and ethanol produce only one carboxylic acid each, as they have only one carbon atom.
- Propanol produces two carboxylic acids, as it has three carbon atoms.
- Butanol produces three carboxylic acids, as it has four carbon atoms.
- Pentanol produces four carboxylic acids, as it has five carbon atoms.
- Hexanol produces five carboxylic acids, as it has six carbon atoms.
Therefore, pentanol (option C) would produce an acid having three structural isomers.
The correct answer is option C, pentanol, which has five carbon atoms.
Explanation:
1. Oxidation with alkaline KMnO4:
Alkaline KMnO4 is a strong oxidizing agent that converts primary and secondary alcohols to carboxylic acids. The reaction involves the oxidation of the alcohol to an aldehyde, which is further oxidized to a carboxylic acid.
2. Acidification of the reaction mixture:
The reaction mixture is then acidified to neutralize the excess KMnO4 and protonate the carboxylic acid product.
3. Structural isomers of carboxylic acids:
The number of structural isomers of a carboxylic acid depends on the number of carbon atoms in the starting alcohol.
- Methanol and ethanol produce only one carboxylic acid each, as they have only one carbon atom.
- Propanol produces two carboxylic acids, as it has three carbon atoms.
- Butanol produces three carboxylic acids, as it has four carbon atoms.
- Pentanol produces four carboxylic acids, as it has five carbon atoms.
- Hexanol produces five carboxylic acids, as it has six carbon atoms.
Therefore, pentanol (option C) would produce an acid having three structural isomers.
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Community Answer
On oxidation with alkaline KMnO4 followed by acidification of the reac...
CH3CH2CH2CH2CH2OH undergoes oxidation with KMnO4 to give CH3CH2CH2CH2COOH.
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On oxidation with alkaline KMnO4 followed by acidification of the reaction mixture, which one of the following alcohols would produce an acid having three structural isomers?a)Propanolb)Butanolc)Pentanold)HexanolCorrect answer is option 'C'. Can you explain this answer?
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