12 Questions
Which step in the halogenation of benzene is considered the rate-determining step?
Addition of Cl to FeCl3
What is the role of the catalyst in the Friedel-Crafts Alkylation reaction?
Speed up the formation of the electrophile
Which species acts as a Lewis acid in the halogenation mechanism?
FeCl3
What is the product of nitration of nitrobenzene?
Nitrobenzene
What is the purpose of H2SO4 in the sulphonation of benzene?
To protonate SO3 and generate electrophile
What is the major disadvantage of Friedel-Crafts alkylation with respect to polyalkylation?
Polymerization of the alkyl group
Which step involves the formation of a σ Complex during SE aromatic substitution?
Step 2: Z anion H Slow + E
Why do benzene rings with strong deactivating groups like NO2, SO3H, CHO, or COOH not undergo Friedel-Crafts alkylation?
Strong electron-withdrawing effect of the substituents
In Friedel-Crafts alkylation, what leads to the rearrangement of the alkyl group?
Formation of a carbocation intermediate
One advantage of Friedel-Crafts acylation over alkylation is:
No polyacylation or rearrangement
What is a common drawback of Friedel-Crafts alkylation when dealing with NH2, NHR, or NR2 substituted benzene rings?
Formation of stable complexes with AlCl3
What effect does the +I effect of CH3 group have in Friedel-Crafts alkylation?
Activates the ring of toluene more than the ring of benzene
Test your knowledge on important organic chemistry reactions like nitration, sulphonation, chlorination, bromination, Friedel-crafts alkylation, Friedel-crafts acylation, and more. Understand the reaction mechanisms, catalysts involved, and products formed in each reaction.
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