Learn IUPAC Nomenclature

Master organic chemistry naming through interactive challenges, tutorials, molecule-building exercises, and practice tests. Draw molecules yourself and get IUPAC names.

Master organic chemistry nomenclature through interactive lessons, molecule-building exercises, challenges, and practice tests.

Learn IUPAC naming step by step with over 70 levels designed for high school chemistry, AP Chemistry, and introductory organic chemistry students. Instead of memorizing rules, you'll actively build, analyze, and name molecules yourself.

FEATURES

• Interactive tutorials that teach nomenclature from the ground up

• Over 70 levels covering:

• Alkanes
• Alkenes
• Alkynes
• Alcohols
• Aldehydes
• Ketones

• Learn in both directions:

• Match molecules to names
• Match names to molecules
• Draw molecules from given names
• Name molecules you create yourself

• Creative Mode: Build your own molecules and let the app generate the correct IUPAC name instantly. Perfect for experimenting, checking homework, or exploring nomenclature rules.

• Practice Tests: Challenge yourself with tests that help you check your progress and identify topics that need more practice.

• Visual learning aids: Color-coded highlights show which parts of a molecule correspond to specific parts of its IUPAC name.

• Hide names and challenge yourself for additional practice.

Planetary Nomenclature Neptune is designed to make learning organic chemistry more engaging, intuitive, and interactive than traditional memorization methods.

Additional supported structures include halogen alkanes and carboxylic acids. Ring structures are not currently supported.

Whether you're preparing for AP Chemistry, studying organic chemistry at school or university, or simply interested in learning chemical nomenclature, this app provides a practical and interactive way to master IUPAC naming.