Chapter U2.29, Problem 6E

Interpretation Introduction

Interpretation:

The reason for two molecules with same molecular formula with different smell needs to be explained.

Concept introduction:

A molecular formula can represent different structures and so different bonding patterns. The physical and chemical properties depend on the bonding particularly on the presence of functional groups.

Answer to Problem 6E

One molecular formula can represent two different structures with different functional groups that can have different smells. One can have a sweet smell and another can have a putrid smell depending on the type of functional group present in it.

Explanation of Solution

Molecules with ester functional groups generally have a sweet fruity smell. Carboxylic acid groups generally have a putrid smell. For the same molecular formula, atoms can rearrange from ester to carboxylic acid group. Thus, due to different functional groups, even if they have the same molecular formula, the smell is different.

Conclusion

Two molecules with the same molecular formula can have different smells if they have different structures or functional groups.