Advertisements
Advertisements
Question
What is the role of \[\ce{HNO3}\] in the nitrating mixture used for nitration of benzene?
Advertisements
Solution
\[\ce{HNO3}\] acts as a base in the nitrating mixture \[\ce{(HNO3 + H2SO4)}\] and provides the electrophile.
\[\ce{HNO3 + H2SO4 -> \underset{Electrophile}{NO^{+}2 + HSO^{-}4} + H2O}\]
APPEARS IN
RELATED QUESTIONS
How is chlorobenzene prepared from aniline?
What is the action of acetic anhydride on ethylamine?
Write the structures of main products when aniline reacts with the following reagents :
(CH3CO)2O/pyridine
Write the chemical equations involved when aniline is treated with the following reagents:
Br2 water
What is the action of acetic anhydride on diethylamine?
What is the action of the following reagents on aniline?
Acetic anhydride
What is the action of the following reagents on aniline?
Hot and conc. sulphuric acid
Illustrate the following reactions giving suitable example in each case
Acetylation of amines
A solution contains 1 g mol. each of p-toluene diazonium chloride and p-nitrophenyl diazonium chloride. To this 1 g mol. of alkaline solution of phenol is added. Predict the major product. Explain your answer.
Assertion: N, N-Diethylbenzene sulphonamide is insoluble in alkali.
Reason: Sulphonyl group attached to nitrogen atom is strong electron-withdrawing group.
When bromination of aniline is carried out by protecting – NH2. The major product is
Give reasons for the following observation:
Aniline is acetylated before nitration reaction.
How can the activating effect of the −NH2 group in aniline be controlled?
Assertion (A): Bromination of benzoic acid, gives m-bromobenzoic acid.
Reason (R): Carboxyl group increases the electron density at the meta position.
Aniline does not give Friedel-Crafts reaction. Give a reason.
Given below are two statements:
Statement I: Aniline does not undergo a Friedel-Crafts alkylation reaction.
Statement II: Aniline cannot be prepared through Gabriel synthesis.
In the light of the above statements, choose the correct answer from the options given below:
