Q3. The molecule acetylsalicylic acid (aspirin) is shown to the right. Label all the functional groups present in this molecule.

Background

Topic: Functional Groups in Organic Molecules

This question tests your ability to identify and name the functional groups present in a common biochemical compound, aspirin. Recognizing functional groups is essential for understanding chemical reactivity and interactions in biochemistry.

Key Terms and Concepts:

• Functional group: A specific group of atoms within a molecule that is responsible for certain characteristic chemical reactions of that molecule.

• Carboxyl group (-COOH): A functional group consisting of a carbonyl and a hydroxyl group attached to the same carbon atom.

• Ester group (-COOR): A functional group derived from a carboxylic acid and an alcohol.

• Aromatic ring (benzene ring): A planar ring of six carbon atoms with alternating double bonds, characteristic of aromatic compounds.

Step-by-Step Guidance

1. Examine the structure of aspirin and identify the benzene ring. This is an aromatic functional group.

2. Look for the carboxyl group (-COOH) attached directly to the benzene ring. This is a common acidic functional group in organic molecules.

3. Find the ester group, which is formed by the linkage of a carbonyl group (C=O) to an oxygen atom that is also bonded to another carbon (in this case, a methyl group).

4. Label each of these groups on the structure: aromatic ring, carboxyl group, and ester group.

5. Check if there are any other functional groups present (such as alcohols, amines, etc.). In aspirin, focus on the three main groups listed above.

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