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Aryl Halides Definition and Preparation Quiz

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Aryl Halides Definition and Preparation Quiz

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Questions and Answers

Why are aryl halides less reactive under SN2 reactions compared to alkyl halides?

Aryl halides form strong hydrogen bonds with the nucleophile.

Aryl halides do not form stable carbocations as intermediates.

Aryl halides have bulky groups attached to the benzene ring. (correct)

Aryl halides have lone pairs on the halogen atom.

Which metal is usually preferred for the preparation of bromobenzene?

Zinc

Copper

Iron (correct)

Aluminum

What is formed first when using iron in the preparation of aryl halides?

Iron(III) chloride

Iron(II) chloride

Iron(III) bromide (correct)

Iron(II) 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. Signup and view all the answers

What differentiates the reactivity of aryl halides from ordinary alkyl halides?

Aryl halides undergo different mechanisms of nucleophilic substitution. Signup and view all the answers

Why do aryl halides not undergo SN1 reactions?

Because they involve backside attack on the carbon-halogen bond. Signup and view all the answers

Why are aryl halides inert under SN2 conditions?

The reaction goes through the plane of the benzene ring. Signup and view all the answers

Which type of aryl halides can undergo nucleophilic substitution reactions?

Aryl halides with ortho or para nitro groups. Signup and view all the answers

In nucleophilic aromatic substitution reactions, which aryl halide is the most reactive?

Aryl fluoride Signup and view all the answers

What is the order of reactivity for aryl halides in SN1 or SN2 reactions?

Ar-F >> Ar-Cl ≈ Ar-Br ≈ Ar-I Signup and view all the answers