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Compound (A) of molecular formula C_(9)H_(7)O_(2)Cl exists in ketoform and predominantly in enolic form (B). On oxidation with KMnO_(4), (A) gives m-chlorobenzoic acid. Identify (A) and (B). |
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Answer» Solution :`DU` in `A= ((2n_(C )+2)-(n_(H)+n_(X)))/2=((2xx9+2)-(7+1))/2=6^(@)`. Since `(C:H~~1:1)`, it must contain contain benzene ring. `A` exists in KETO and predominantly in enolic FORM `B`. Hence, compound `A` must be carbonyl compound which has `alpha-H` atom because it is enolised. A on oxidation gives m-chlorobezoic acid, so carbonyl compound must be at m-position w.r.t. `(Cl)` group. Reactions: 
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