--- title: "IUPAC Naming Worksheet with Answers (Free PDF) | MolDraw" url: https://www.moldraw.com/educational-materials/iupac-naming-worksheet/ description: "IUPAC naming worksheet with answers: name and draw alkanes, alkenes, alcohols, aldehydes, ketones, acids, esters and haloalkanes. Free printable PDF." lang: en publisher: Scidart Academy generated: 2026-10-28 --- [MolDraw](https://www.moldraw.com/) › [Educational materials](https://www.moldraw.com/educational-materials/) › IUPAC Naming Worksheet # IUPAC Naming Worksheet Organic chemistryGrades 11–12 · A-level / IB · AP Chemistry · CBSE/JEE · Intro college organic19 items · answer key included This IUPAC naming worksheet gives students focused organic nomenclature practice in both directions: Part A asks them to name 12 structures (branched alkanes, alkenes, alcohols, aldehydes, ketones, carboxylic acids, esters and haloalkanes), and Part B asks them to draw the structure from the name. Every answer uses current IUPAC recommendations, such as pentan-2-one and butan-2-ol, with the older names shown in brackets, so the answer key works for any syllabus. Use it as a naming organic compounds worksheet for homework, a starter or revision before a test, and print it as a free PDF with or without answers. ## Customise Sheet title Subtitle School / teacher Student lines Name Class Date Answers None Answer key page Inline Text size S M L Structure size 100% Questions Part A — Name the structure Name: 2-methylbutane Name: 2,2-dimethylbutane Name: 3,4-dimethylhexane Name: 3-ethylhexane Name: 3-methylbut-1-ene (3-methyl-1-butene) Name: butan-2-ol (2-butanol) Name: 2-methylpropan-2-ol (tert-butyl alcohol) Name: pentan-2-one (2-pentanone) Name: butanal Name: 3-methylbutanoic acid Name: ethyl ethanoate (ethyl acetate) Name: 2-chlorobutane Part B — Draw the structure Draw: 2,3-dimethylpentane Draw: hex-1-ene Draw: 3-methylbutan-2-ol Draw: 2-methylpropanal Draw: methyl propanoate Draw: 2-bromo-2-methylpropane Draw: 2-methylpentan-3-one Live A4 preview. “Download PDF” opens the print dialog: choose **Save as PDF**. Click a structure to open it in MolDraw. ## IUPAC Naming Worksheet Name Class Date ## Part A — Name the structure Write the IUPAC name under each structure. Remember to choose the longest chain containing the functional group and give it the lowest locant. 1. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-3df5632e5f.svg) 2-methylbutane 2. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-5c0c31ab0c.svg) 2,2-dimethylbutane 3. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-1ab0cf421c.svg) 3,4-dimethylhexane 4. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-62f3fb0393.svg) 3-ethylhexane 5. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-5cf85e9b06.svg) 3-methylbut-1-ene (3-methyl-1-butene) 6. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-2c780fae62.svg) butan-2-ol (2-butanol) 7. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-8ec5351bef.svg) 2-methylpropan-2-ol (tert-butyl alcohol) 8. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-f5a502b075.svg) pentan-2-one (2-pentanone) 9. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-8952c0b61f.svg) butanal 10. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-4624877242.svg) 3-methylbutanoic acid 11. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-ba801d871d.svg) ethyl ethanoate (ethyl acetate) 12. ![Structure to name](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-d27bee483b.svg) 2-chlorobutane ## Part B — Draw the structure Draw a skeletal (or displayed) formula for each compound in the box. 13. 2,3-dimethylpentane ![Structure of 2,3-dimethylpentane](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-ec24880dad.svg) 14. hex-1-ene ![Structure of hex-1-ene](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-51634ed079.svg) 15. 3-methylbutan-2-ol ![Structure of 3-methylbutan-2-ol](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-026730f4c8.svg) 16. 2-methylpropanal ![Structure of 2-methylpropanal](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-dc9211221e.svg) 17. methyl propanoate ![Structure of methyl propanoate](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-cdc5d39e9c.svg) 18. 2-bromo-2-methylpropane ![Structure of 2-bromo-2-methylpropane](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-a515b82344.svg) 19. 2-methylpentan-3-one ![Structure of 2-methylpentan-3-one](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-daac734359.svg) moldraw.com/educational-materials/iupac-naming-worksheet/ ## Answer key: IUPAC Naming Worksheet ## Part A — Name the structure 1. 2-methylbutane 2. 2,2-dimethylbutane 3. 3,4-dimethylhexane 4. 3-ethylhexane 5. 3-methylbut-1-ene (3-methyl-1-butene) 6. butan-2-ol (2-butanol) 7. 2-methylpropan-2-ol (tert-butyl alcohol) 8. pentan-2-one (2-pentanone) 9. butanal 10. 3-methylbutanoic acid 11. ethyl ethanoate (ethyl acetate) 12. 2-chlorobutane ## Part B — Draw the structure 13. ![Structure of 2,3-dimethylpentane](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-ec24880dad.svg) 14. ![Structure of hex-1-ene](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-51634ed079.svg) 15. ![Structure of 3-methylbutan-2-ol](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-026730f4c8.svg) 16. ![Structure of 2-methylpropanal](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-dc9211221e.svg) 17. ![Structure of methyl propanoate](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-cdc5d39e9c.svg) 18. ![Structure of 2-bromo-2-methylpropane](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-a515b82344.svg) 19. ![Structure of 2-methylpentan-3-one](https://www.moldraw.com/educational-materials/img/iupac-naming-worksheet/s-daac734359.svg) ## How to use this worksheet 1. Teach the steps first: find the longest chain that contains the functional group, number it so the group gets the lowest locant, then list substituents alphabetically. 2. Accept older names (2-pentanone, 2-butanol) if your syllabus uses them, but point out where the locant goes in the current IUPAC style. 3. Part B is ideal for peer marking: students swap sheets and check each other's skeletal formulas against the answer key. 4. Fast finishers can draw each Part A structure in MolDraw and compare the name it gives. 5. Set the title, student lines and answer option on the left, then press **Download PDF** and choose “Save as PDF” (or print directly). Your choices are remembered on this device. **Draw and edit structures in MolDraw.** Make your own questions: draw any molecule, then export it as PNG or SVG for your worksheets. [Draw and edit structures in MolDraw](https://www.moldraw.com/) ## Frequently asked questions ### What are the basic rules for IUPAC naming of organic compounds? Find the longest carbon chain that contains the main functional group, number it so the functional group (then double bonds, then substituents) gets the lowest locants, name substituents in alphabetical order with di-/tri- prefixes, and add the suffix for the main group, e.g. -ol, -al, -one or -oic acid. ### Is it 2-pentanone or pentan-2-one? Both describe the same compound. Current IUPAC recommendations put the locant right before the suffix (pentan-2-one); 2-pentanone is the older style that is still widely accepted. The answer key gives the current name with the older one in brackets. ### How do you name esters? Name the alkyl group attached to the single-bonded oxygen first, then the acid part with the ending -oate. CH3COOCH2CH3 is therefore ethyl ethanoate (ethyl acetate). ### Which functional group has priority when naming? The usual order is carboxylic acid > ester > aldehyde > ketone > alcohol > amine. Alkenes, alkyl groups and halogens are never the suffix-defining group; halogens are always prefixes (chloro-, bromo-). ### Does this worksheet include an answer key? Yes. The answer key gives the IUPAC name of every structure in Part A and a drawn structure for every name in Part B. 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