Advertisements
Advertisements
प्रश्न
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.
Advertisements
उत्तर
It is given that compound ‘C’ having the molecular formula C6H7N is formed by heating compound ‘B’ with Br2 and KOH. This is a Hoffmann bromamide degradation reaction. Therefore, compound ‘B’ is an amide and compound ‘C’ is an amine. The only amine having the molecular formula C6H7N is aniline (C6H5NH2).
Therefore, compound ‘B’ (from which ‘C’ is formed) must be benzamide (C6H5CONH2).
Further, benzamide is formed by heating compound ‘A’ with aqueous ammonia. Therefore, compound ‘A’ must be benzoic acid.
The given reactions can be explained with the help of the following equations:
APPEARS IN
संबंधित प्रश्न
Which among the following molecular formulae represents urotropine?
(a) C6H12N4
(b) C6H24H4
(c) C6H12N4O2
(d) C6H24N4O2
Convert aniline into 1, 3, 5-tribromobenzene.
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.
(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.
Aniline and N-methylaniline
Account for the following:
pKb of aniline is more than that of methylamine.
How will you convert hexanenitrile into 1-aminopentane?
How will you convert methanol to ethanoic acid?
How will you convert ethanoic acid into propanoic acid?
How will you convert methanamine into ethanamine?
How will you convert propanoic acid into ethanoic acid?
Complete the following reaction:
\[\ce{C6H5N2Cl + C2H5OH ->}\]
Complete the following reaction:
\[\ce{C6H5NH2 + Br2 (aq) ->}\]
Write the structure of 2,4-dinitrochlorobenzene
How are ethylamine and ethyl methyl amine distinguished by using nitrous acid?
The following amine is called as:
Do the following conversions in not more than two steps:
\[\begin{array}{cc}
\ce{CH3CN to CH3 - C - CH3}\\
\phantom{...........}||\\
\phantom{...........}\ce{O}
\end{array}\]
Do the following conversions in not more than two steps:
