Chapter U2.33, Problem 8E

Interpretation Introduction

Interpretation:

The way to change the smell of a molecule needs to be explained.

Concept introduction:

Different compounds have different structural features and so different smell. Different functional groups have different bonding interaction with receptor of nasal cavities.

Answer to Problem 8E

To change the smell of a molecule, its functional group must be changed.

Explanation of Solution

The functional groups are atoms or group of atoms which controls the physical and chemical properties of a compound. Remaining part of the molecule has less influence in the physical and chemical properties of a compound. For example ester has fruity smell, carboxylic compounds are putrid, alcoholic compounds have pungent odor and ketone have minty smell. Thus, the smell depends on functional groups present in the molecule. Thus, to change the smell of a molecule, its functional group must be changed.