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How many isomers of C4H8O when reacts with CH3MgBr followed by acidification to alcohol (only consider carbonyl isomers and Including stereoisomers)?
- a)2
- b)3
- c)4
- d)5
Correct answer is option 'A'. Can you explain this answer?
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How many isomers of C4H8O when reacts with CH3MgBr followed by acidifi...
Isomers of C4H8O when reacts with CH3MgBr followed by acidification to alcohol (only consider carbonyl isomers and Including stereoisomers)
There are different isomers possible for C4H8O when reacts with CH3MgBr followed by acidification to alcohol. Let's consider them one by one:
1. But-2-enal
- But-2-enal has a double bond between C2 and C3 and an aldehyde functional group (CHO) at C2.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (Z)-but-2-en-1-ol, which has a stereoisomer (E)-but-2-en-1-ol.
- Therefore, the total number of isomers for but-2-enal is 2.
2. But-2-yn-1-ol
- But-2-yn-1-ol has a triple bond between C2 and C3 and an alcohol functional group (OH) at C1.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (E)-but-2-en-1-ol, which has a stereoisomer (Z)-but-2-en-1-ol.
- Therefore, the total number of isomers for but-2-yn-1-ol is 2.
3. 2-Methylpropanal
- 2-Methylpropanal has an aldehyde functional group (CHO) at C2 and a methyl group (CH3) at C3.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (S)-2-methylpropan-1-ol, which has a stereoisomer (R)-2-methylpropan-1-ol.
- Therefore, the total number of isomers for 2-methylpropanal is 2.
4. 3-Methylbutanal
- 3-Methylbutanal has an aldehyde functional group (CHO) at C3 and a methyl group (CH3) at C2.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (R)-3-methylbutan-1-ol, which has a stereoisomer (S)-3-methylbutan-1-ol.
- Therefore, the total number of isomers for 3-methylbutanal is 2.
Therefore, the total number of isomers for C4H8O when reacts with CH3MgBr followed by acidification to alcohol is 2+2+2+2 = 8. However, the question only considers carbonyl isomers, which are but-2-enal and 2-methylpropanal. Therefore, the correct answer is option A, which is 2.
There are different isomers possible for C4H8O when reacts with CH3MgBr followed by acidification to alcohol. Let's consider them one by one:
1. But-2-enal
- But-2-enal has a double bond between C2 and C3 and an aldehyde functional group (CHO) at C2.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (Z)-but-2-en-1-ol, which has a stereoisomer (E)-but-2-en-1-ol.
- Therefore, the total number of isomers for but-2-enal is 2.
2. But-2-yn-1-ol
- But-2-yn-1-ol has a triple bond between C2 and C3 and an alcohol functional group (OH) at C1.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (E)-but-2-en-1-ol, which has a stereoisomer (Z)-but-2-en-1-ol.
- Therefore, the total number of isomers for but-2-yn-1-ol is 2.
3. 2-Methylpropanal
- 2-Methylpropanal has an aldehyde functional group (CHO) at C2 and a methyl group (CH3) at C3.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (S)-2-methylpropan-1-ol, which has a stereoisomer (R)-2-methylpropan-1-ol.
- Therefore, the total number of isomers for 2-methylpropanal is 2.
4. 3-Methylbutanal
- 3-Methylbutanal has an aldehyde functional group (CHO) at C3 and a methyl group (CH3) at C2.
- When reacted with CH3MgBr, it forms a Grignard reagent, which can then be protonated to form an alcohol.
- The resulting alcohol is (R)-3-methylbutan-1-ol, which has a stereoisomer (S)-3-methylbutan-1-ol.
- Therefore, the total number of isomers for 3-methylbutanal is 2.
Therefore, the total number of isomers for C4H8O when reacts with CH3MgBr followed by acidification to alcohol is 2+2+2+2 = 8. However, the question only considers carbonyl isomers, which are but-2-enal and 2-methylpropanal. Therefore, the correct answer is option A, which is 2.
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How many isomers of C4H8O when reacts with CH3MgBr followed by acidifi...
C4H8O 
2° Alcohol, if we consider only carbonyl isomer.
We Will 2 ismoers as shown below.
2° Alcohol, if we consider only carbonyl isomer.We Will 2 ismoers as shown below.
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How many isomers of C4H8O when reacts with CH3MgBr followed by acidification to alcohol (only consider carbonyl isomers and Including stereoisomers)?a)2b)3c)4d)5Correct answer is option 'A'. Can you explain this answer?
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