The compound shown does not give a coloured complex with neutral FeCl3. Select all of the structures shown that do (a phenolic OH or a stable enol is needed).

MolSynapse / Question bank / Structural Identification and Practical Organic Chemistry / Which drawn compound gives a given test

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3si261

The compound shown does not give a coloured complex with neutral $FeCl X_{3}$ . Select all of the structures shown that do (a phenolic OH or a stable enol is needed).

AStructure A
BStructure B
CStructure C
DStructure D

Answer: B, D

Neutral

FeCl X_{3}

complexes phenols and enols. B (pentane-2,4-dione) exists largely as its enol and gives a red colour. D (salicylaldehyde) has a free phenolic OH and gives violet. A (benzyl alcohol) has an alcoholic OH and C (propanone) is hardly enolised.

Practice Structural Identification and Practical Organic Chemistry More on Which drawn compound gives a given test

Previous questionNext question

The compound shown does not give a coloured complex with neutral FeClX3​. Select all of the structures shown that do (a phenolic OH or a stable enol is needed).

Answer: B, D

More questions on Which drawn compound gives a given test

The compound shown does not give a coloured complex with neutral $FeCl X_{3}$ . Select all of the structures shown that do (a phenolic OH or a stable enol is needed).