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Which of the following amines fail to gi...

Which of the following amines fail to give positive isocyanide test ?

A

`C_(6)H_(5)NHCH_(3)`

B

`C_(6)H_(5)N(CH_(3))_(2`

C

Both (1) and (2)

D

`C_(6)H_(5)NH_(2)`

Text Solution

Verified by Experts

The correct Answer is:
C
Aliphatic and aromatic primary amines on heating with chloroform and ethanolic potassium hydroxide form isocyanides or carbylamines which are foul smelling compounds
`underset(ArNH_(2))overset(RNH_(2))or (CHCI_(3)//KOH)/("ethanol, heat") underset(ArNC)overset(RNC)or`
This reactions is known as carbylamine reaction and is used as a chemical test (iscocyanide test) for primary amines because secondary and tertiary amines do not show this reaction It is also used as a test for chloroform .
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