Organic Chemistry : Benzene Additions

Study concepts, example questions & explanations for Organic Chemistry

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Example Questions

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Example Question #1 : Predicting Benzene Orientation

Predict the product of the given reaction.

Screen shot 2015 12 26 at 9.13.35 pm

Possible Answers:

I

III

II

IV

Correct answer:

IV

Explanation:

This is an example of a Friedel-Crafts acylation reaction, where an acyl group (an alkyl group with a carbonyl  group) is added at the carbonyl carbon (shown below). Aluminum chloride is used as a catalyst in this reaction.Screen shot 2015 12 26 at 10.36.31 pm

Example Question #1 : Predicting Benzene Orientation

What is the product of the reaction shown?

Screen shot 2015 12 26 at 9.13.59 pm

Possible Answers:

IV

I

II

III

Correct answer:

II

Explanation:

This reaction is known as a nitration reaction, in which a nitro group ( group) is added to an aromatic ring. Nitric acid is used because this reaction occurs in an acidic solution.

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