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Substituent Library

Interactive reference for all common organic substituents (R groups). Browse by category, see structures, naming rules, abbreviations, and example molecules.

Learning Objectives

  • Recognize and name all common alkyl, halogen, and functional group substituents
  • Understand the difference between prefix and suffix naming roles
  • Learn common abbreviations (Me, Et, iPr, tBu, Ph, Bn)
  • Identify common naming mistakes for easily confused groups