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प्रश्न
Give one chemical test to distinguish between the following pair of compounds.
Aniline and N-methylaniline
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उत्तर
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.
\[\ce{\underset{(Primary amine)}{\underset{Aniline}{C6H5NH2}} + CHCl3 + 3KOH ->[\Delta] \underset{(foul smell)}{\underset{Benzyl isocyanide}{C6H5NC}} + 3KCl + 3H2O}\]
\[\ce{\underset{(Secondary amine)}{\underset{N-methylaniline}{C6H5NHCH3}} + CHCl3 + 3KOH ->[\Delta] No reaction}\]
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संबंधित प्रश्न
Which among the following molecular formulae represents urotropine?
(a) C6H12N4
(b) C6H24H4
(c) C6H12N4O2
(d) C6H24N4O2
Write the IUPAC name of the following compound and classify it as primary, secondary and tertiary amine.
(CH3CH2)2NCH3
Account for the following:
pKb of aniline is more than that of methylamine.
Account for the following:
Ethylamine is soluble in water, whereas aniline is not.
Account for the following:
Methylamine in water reacts with ferric chloride to precipitate hydrated ferric oxide.
How will you convert ethanoic acid into methanamine?
How will you convert ethanamine into methanamine?
How will you convert ethanoic acid into propanoic acid?
Accomplish the following conversion:
Benzoic acid to aniline
An aromatic compound ‘A’ on treatment with aqueous ammonia and heating forms compound ‘B’ which on heating with Br2 and KOH forms a compound ‘C’ of molecular formula C6H7N. Write the structures and IUPAC names of compounds A, B and C.
Complete the following reaction:
\[\ce{C6H5N2Cl + C2H5OH ->}\]
Complete the following reaction:
\[\ce{C6H5NH2 + (CH3CO)2O ->}\]
Give reasons Although –NH2 is o/p directing group, yet aniline on nitration gives a significant amount of m-nitroaniline
What is the action of p-toluenesulphonychloride on ethylamine and diethylamine?
Give simple chemical tests to distinguish between the following pair of compounds:
Benzaldehyde and Benzoic acid
Using IUPAC norms, write the formula of Hexaamminecobalt(III) sulphate.
Predict the product 'A' in the following reaction.
\[\ce{\underset{(Acetyl chloride)}{CH3COCl}->[H2][Pd-BaSO4]A + HCl}\]
