Chapter 23, Problem 75A

Interpretation Introduction

Interpretation : To compare the structure as well as the functional groups of acetylsalicylic acid (aspirin) and Ibuprofen.

Concept Introduction: The difference between the two compounds lies in the functional group and also the number of carbons, hydrogens, and oxygens present in the structure, which help to differentiate between the two structures. The main differentiation is given only by the functional group present.

Answer to Problem 75A

The structural formula of acetyl-salicylic acid is ${\text{C}}_9{\text{H}}_8{\text{O}}_4$ and the structure will be as follows:

  

The structural formula of Ibuprofen is ${\text{C}}_{13}{\text{H}}_{18}{\text{O}}_2$ and the structure will be as follows:

  

Explanation of Solution

If the structure of acetyl salicylic acid is considered, it has a carboxylic group and also an acetyl group which is called as ester group. When the structure of Ibuprofen is considered, it has only a carboxylic group present and also some alkyl groups present. Both structures have an aromatic ring as that of benzene is present.

Conclusion

Although, both the structures have carboxylic groups in common, acetyl salicylic acid has an extra functional group which is acetyl group that makes it different from Ibuprofen.