One Integer Value Correct TypeDirection (Q. Nos. 23-26) This section c...
Explanation:
To determine the number of different enols that exist for 4-methyl-3-hexanone, we need to understand the concept of enol tautomers.
Enol Tautomers:
Enol tautomers are constitutional isomers that occur due to the migration of a proton between the oxygen and the adjacent carbon atom in a carbonyl compound. This process results in the formation of an enol, which contains a double bond between the carbon and the oxygen atom.
Structural Formula of 4-methyl-3-hexanone:
The structural formula of 4-methyl-3-hexanone is CH3-CO-CH2-CH2-CH2-CH3.
Possible Enol Tautomers:
To determine the number of possible enol tautomers, we need to identify the α-carbon atom, which is the carbon atom adjacent to the carbonyl group (C=O). In this case, the α-carbon atom is the second carbon atom in the chain (CH3-CO-CH2-CH2-CH2-CH3).
Key Points:
- The α-carbon atom must have at least one hydrogen atom attached to it.
- The hydrogen atom on the α-carbon atom can migrate to the oxygen atom to form a double bond.
Possible Enol Tautomers for 4-methyl-3-hexanone:
1. CH3-CO-CH=CH-CH2-CH3: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
2. CH3-CO-CH=CH2-CH3: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
3. CH3-CO-CH2-CH=CH2: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
4. CH3-CO-CH2-CH=CH-CH3: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
5. CH3-CO-CH=CH-CH2-CH3: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
6. CH3-CO-CH=CH2-CH2-CH3: The hydrogen on the α-carbon migrates to the oxygen atom, forming a double bond between the carbon and the oxygen atom.
Conclusion:
Hence, there are 6 different enols that exist for 4-methyl-3-hexanone.