Alkanoic anhydrides (acid anhydrides)

General formula:

Functional group:

Suffix:

oic anhydride

An acid anhydride may be considered as the condensation product of two molecule of a monocarboxylic acid obtained by losing one molecule of water.

The common and IUPAC names of an acid anhydride are obtained from the common and IUPAC names of the parent acid by replacing the word acid by anhydride.

IUPAC name of an acid anhydride = IUPAC name of acid parent acid - acid + anhydride
                                                       = Alkanoic anhydride

For example, Ethanoic anhydride (acetic anhydride, parent acid is ethanoic acid)