Chapter 21, Problem 77A

(a)

Interpretation Introduction

Interpretation:

The name of the following compound should be determined:

Concept introduction:

The ring structures of the compound having uncommon stability due to delocalized pi electron density shared in between all the carbon atoms of the ring is said to be an aromatic compound.

Answer to Problem 77A

Methylbenzene.

Explanation of Solution

The main group in the given compound is benzene which has a methyl group substituent. The name of the compound should be written in such a way that name of substituent is written first followed by the name of the main group. So, the name of the compound is methylbenzene, which is also known as toluene.

(b)

Interpretation Introduction

Interpretation:

The name of the following compound should be determined:

Concept introduction:

The ring structures of the compound having uncommon stability due to delocalized pi electron density shared in between all the carbon atoms of the ring is said to be an aromatic compound.

Answer to Problem 77A

Anthracene.

Explanation of Solution

The given compound is a fused benzene ring compound, in “fused” benzene rings molecule, two or more benzene rings have two carbon atoms in common. The semi-trivial name of the given compound is anthracene.