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ChemistryOrganic Chemistry

Organic Functional Groups in Methionine, Ibuprofen, and Capsaicin

Identify all functional groups in three original molecular drawings and distinguish sulfide from thiol, phenol from alcohol, and amide from amine.

Question

Identify the functional groups in each molecule below using the categories in Table 3.1 of the source.

(a) Methionine

Original OpenStax structure of Methionine.

(b) Ibuprofen

Original OpenStax structure of Ibuprofen.

(c) Capsaicin

Original OpenStax structure of Capsaicin.

Original drawings: OpenStax Organic Chemistry, Problem 3-1.

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Evidence boundary

The three structures are reproduced from OpenStax Organic Chemistry Problem 3-1. The identification refers to those drawings, including neutral methionine as drawn, rather than its solution protonation state. The official key calls capsaicin’s aromatic OH an alcohol; this answer adds the more specific term phenol.