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Organic Chemistry

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Aromatic Compounds

Question
14 out of 16
 

The earliest predictions about the structure of benzene could not completely explain some of its properties. Later it was found that benzene has a cyclic structure which is commonly represented as follows:

image\27771 ch 18 passage 1.png

These two structures are resonance structures of benzene. Benzene is also commonly represented as shown below:

image\27782 ch 18 passage 1.png

A series of reactions were conducted using benzene and other aromatic compounds.

Reaction 1

In Reaction 1, benzene was reacted with n-propyl chloride in the presence of AlCl3.

Reaction 2

Nitrobenzene was reacted with nitric acid and sulfuric acid. The reaction occurred as follows:


image\Ch 18 pass react 2.png


The reaction shown here is:

image\Ch 18 Q 14.png



A An electrophilic substitution reaction
B An electrophilic addition reaction
C A reduction-addition reaction
D An electrophilic elimination reaction
Ans. A The reaction shown is neither an addition reaction, nor an elimination reaction. So the Choices B, C, and D can be ruled out. This is a typical electrophilic substitution reaction.

Aromatic Compounds Flashcard List

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