Advertisements
Advertisements
प्रश्न
Give one chemical test to distinguish between the following pair of compounds.
Aniline and benzylamine
Advertisements
उत्तर
Aniline and benzylamine can be distinguished by their reactions with the help of nitrous acid, which is prepared in situ from a mineral acid and sodium nitrite. Benzylamine reacts with nitrous acid to form unstable diazonium salt, which in turn gives alcohol with the evolution of nitrogen gas.
\[\ce{\underset{Benzylamine}{C6H5CH2 - NH2} + HNO2 ->[NaNO2 + HCl] \underset{(Unstable)}{[C6H5CH2 - \overset{+}{N2}C\overset{-}{l}]} ->[H2O] N2 ^ + \underset{Benzy alcohol}{C6H5CH2 - OH} + HCl}\]
On the other hand, aniline reacts with HNO2 at a low temperature to form stable diazonium salt. Thus, nitrogen gas is not evolved.
\[\ce{C6H5NH2 ->[NaNO2 + HCl][273 - 278 K] C6H5 - \overset{+}{N2}C\overset{-}{l} + NaCl + 2H2O}\]
APPEARS IN
संबंधित प्रश्न
Convert 3-Methylaniline into 3-nitrotoluene.
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.
Methylamine and dimethylamine
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
Give one chemical test to distinguish between the following pair of compounds.
Aniline and N-methylaniline
Account for the following:
Ethylamine is soluble in water, whereas aniline is not.
How will you convert ethanoic acid into methanamine?
How will you convert hexanenitrile into 1-aminopentane?
How will you convert ethanamine into methanamine?
How will you convert nitromethane into dimethylamine?
Complete the following reaction:
\[\ce{C6H5N2Cl + C2H5OH ->}\]
What is the action of p-toluenesulphonychloride on ethylamine and diethylamine?
How are ethylamine and ethyl methyl amine distinguished by using nitrous acid?
Write the IUPAC name of the given compound :
Do the following conversions in not more than two steps:
\[\begin{array}{cc}
\ce{CH3CN to CH3 - C - CH3}\\
\phantom{...........}||\\
\phantom{...........}\ce{O}
\end{array}\]
