10 Questions
Why are aryl halides less reactive under SN2 reactions compared to alkyl halides?
Aryl halides have bulky groups attached to the benzene ring.
Which metal is usually preferred for the preparation of bromobenzene?
Iron
What is formed first when using iron in the preparation of aryl halides?
Iron(III) bromide
Why is 1-ethyl-2-iodobenzene classified as an aryl iodide and not an aryl halide?
The iodine atom is directly attached to the benzene ring.
What differentiates the reactivity of aryl halides from ordinary alkyl halides?
Aryl halides undergo different mechanisms of nucleophilic substitution.
Why do aryl halides not undergo SN1 reactions?
Because they involve backside attack on the carbon-halogen bond.
Why are aryl halides inert under SN2 conditions?
The reaction goes through the plane of the benzene ring.
Which type of aryl halides can undergo nucleophilic substitution reactions?
Aryl halides with ortho or para nitro groups.
In nucleophilic aromatic substitution reactions, which aryl halide is the most reactive?
Aryl fluoride
What is the order of reactivity for aryl halides in SN1 or SN2 reactions?
Ar-F >> Ar-Cl ≈ Ar-Br ≈ Ar-I
Test your knowledge on aryl halides, compounds where a halogen is bound to the carbon of a benzene ring. Learn about the difference between aryl iodides and aryl halides and their preparation methods using different halogens.
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