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Keto-enol tautomerism is not observed in...

Keto-enol tautomerism is not observed in:

A

`C_(6)H_(5)-overset(O)overset(||)(C)-H`

B

`C_(6)H_(5)-overset(O)overset(||)(C)-CH_(3)`

C

`C_(6)H_(5)-overset(O)overset(||)(C)-CH(CH_(3))_(2)`

D

`C_(6)H_(5)-overset(O)overset(||)(C)-CH_(2)-overset(O)overset(||)(C)-CH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
A
Due to absent of `alpha`-hydrogen with respect to `C=O`.
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