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An organic compound A with molecular formula C8H8O gives positive DNP and iodoform tests. It does not reduce tollen's reagent or Fehling's reagent and does not decolourise bromine water also. On oxidation with Chromatic acid it gives a carboxylic acid B with molecular formula C7H6O2. Deduce the structures of A and B.

(A) forms 2,4-DNP derivative. Therefore, it is an aldehyde or a ketone.Since it does not reduce Tollens or Fehling reagent, (A) must be a ketone.(A) responds to iodoform test. Therefore, it should be a methyl ketone.The molecular formula of (A) indicates high degree of unsaturation, yetit does not decolourise bromine water or Baeyers reagent. This indicatesthe presence of unsaturation due to an aromatic ring.Compound (B), being an oxidation product of a ketone should be acarboxylic acid. The molecular formula of (B) indicates that it shouldbe benzoic acid and compound (A) should, therefore, be amonosubstituted aromatic methyl ketone. The molecular formula of(A) indicates that it should be phenyl methyl ketone (acetophenone).A is acetophenone

B is benzoic acid

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A) forms 2,4-DNP derivative. Therefore, it is an aldehyde or a ketone.Since it does not reduce Tollens or Fehling reagent, (A) must be a ketone.(A) responds to iodoform test. Therefore, it should be a methyl ketone.The molecular formula of (A) indicates high degree of unsaturation, yetit does not decolourise bromine water or Baeyers reagent. This indicatesthe presence of unsaturation due to an aromatic ring.Compound (B), being an oxidation product of a ketone should be acarboxylic acid. The molecular formula of (B) indicates that it shouldbe benzoic acid and compound (A) should, therefore, be amonosubstituted aromatic methyl ketone.

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Write the reaction involved in the manufacture of ammonia by Haber process.Give a reaction to prepare urea from ammonia
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