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Basic IUPAC Organic Nomenclature

Acid Anhydrides

Nomenclature
Formula
3D structure
Functional class name = alkanoic anhydride

Substituent suffix = -oic anhydride


  • Functional group is an acid anhydride therefore suffix = -oic anhydride
  • Hydrocarbon structure is an alkane therefore -an-
  • The longest continuous chain is C2 therefore root = eth
ethanoic anhydride
anhydride

CH3C(=O)OC(=O)CH3

  • Functional group is an acid anhydride therefore suffix = -oic anhydride
  • Hydrocarbon structure is an alkane therefore -an-
  • The longest continuous chain is C4 therefore root = but
  • The other group is C3 = prop
butanoic propanoic anhydride
anhydride
  • Functional group is a cyclic acid anhydride therefore suffix = -dioic anhydride
  • Hydrocarbon structure is an alkane therefore -an-
  • The longest continuous chain is C5 therefore root = pent

pentandioic anhydride
cyclic anhydride




organic chemistry Dr. Ian Hunt, Department of Chemistry University of Calgary