IUPAC nomenclature provides a systematic way to name organic compounds so that every name points to one — and only one — structure.
Why IUPAC Names Matter
Chemists worldwide use IUPAC names to communicate without ambiguity. Common names like "acetone" or "formaldehyde" are convenient but don't scale. IUPAC rules let you encode a compound's entire carbon backbone, substituents, and functional groups into a single string.
The Basic Algorithm
- Find the longest carbon chain that includes the principal functional group.
- Number the chain so the principal group gets the lowest possible locant.
- Name substituents as prefixes (alphabetical) with their locant numbers.
- Add the suffix that matches the highest-priority functional group (e.g., -ol for alcohols, -al for aldehydes, -one for ketones).
Quick Examples
| Structure | IUPAC Name |
|---|---|
| CH₃CHO | Ethanal |
| CH₃COCH₃ | Propan-2-one |
| CH₃CH₂OH | Ethanol |
Need help with a problem?
Upload your question and get a verified, step-by-step solution in seconds.
Open GPAI Solver →