Advertisements
Advertisements
Question
Give one chemical test to distinguish between the following pair of compounds.
Aniline and N-methylaniline
Solution
Aniline and N-methylaniline can be distinguished using the Carbylamine test. Primary amines, on heating with chloroform and ethanolic potassium hydroxide, form foul-smelling isocyanides or carbylamines. Aniline, being an aromatic primary amine, gives a positive carbylamine test. However, N-methylaniline, being a secondary amine, does not.
\[\ce{\underset{(Primary amine)}{\underset{Aniline}{C6H5NH2}} + CHCl3 + 3KOH ->[\Delta] \underset{(foul smell)}{\underset{Benzyl isocyanide}{C6H5NC}} + 3KCl + 3H2O}\]
\[\ce{\underset{(Secondary amine)}{\underset{N-methylaniline}{C6H5NHCH3}} + CHCl3 + 3KOH ->[\Delta] No reaction}\]
APPEARS IN
RELATED QUESTIONS
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3)2CHNH2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
CH3NHCH(CH3)2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3)3CNH2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3CH2)2NCH3
Give one chemical test to distinguish between the following pair of compounds.
Secondary and tertiary amines
Give one chemical test to distinguish between the following pair of compounds.
Ethylamine and aniline
Account for the following:
pKb of aniline is more than that of methylamine.
How will you convert methanol to ethanoic acid?
How will you convert ethanoic acid into propanoic acid?
Accomplish the following conversion:
Aniline to 2, 4, 6-tribromofluorobenzene
Accomplish the following conversion:
Chlorobenzene to p-chloroaniline
Accomplish the following conversion:
Aniline to benzyl alcohol
Complete the following reactions:
`C_6H_5NH_2 +H_2SO_4(conc.) ->`
Complete the following reactions:
`C_6H_5NH_2 + (CH_3CO)_2O->`
Do the following conversions in not more than two steps :
Propanone to Propene
What is the action of p-toluenesulphonychloride on ethylamine and diethylamine?
Using IUPAC norms write the formula of Hexaamminecobalt (III) sulphate.
Identify the incorrect IUPAC name.
An organic compound (A) with molecular formula C3H7NO on heating with Br2 and KOH forms a compound (B). Compound (B) on heating with CHCl3 and alcoholic KOH produces a foul-smelling compound (C) and on reacting with C6H5SO2Cl forms a compound (D) which is soluble in alkali. Write the structure of (A), (B), (C) and (D).
