Given below are two statements : In the light of the above statements, choose the correct answer from the options given below :
- Both Statement I and Statement II are true
- Both Statement I and Statement II are false
- Statement I is true but Statement II is false
- Statement I is false but Statement II is true
Answer
(3) Statement I is true but Statement II is false
Solution
Statement I:
[figure]
Both are C10H18O cyclohexanones with the same functional group, but the alkyl groups on the two α-carbons differ (ethyl / ethyl and methyl / n-propyl)
⇒ they are metamers ⇒ Statement I is true.
Statement II:
[figure]
Keto–enol tautomerism needs at least one α-hydrogen. Both α-carbons (C-2 and C-6) carry two methyl groups and no H
⇒ no enol can form ⇒ Statement II is false.
Answer: (3)