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Acid anhydride

An acid anhydride is a type of chemical compound derived by the removal of water molecules from an acid.

In organic chemistry, organic acid anhydrides contain the functional group R(CO)O(CO)R'. Organic acid anhydrides often form when one equivalent of water is removed from two equivalents of an organic acid in a dehydration reaction.

In inorganic chemistry, an acid anhydride refers to an acidic oxide, an oxide that reacts with water to form an oxyacid (an inorganic acid that contains oxygen or carbonic acid), or with a base to form a salt.

Nomenclature

The nomenclature of organic acid anhydrides is derived from the names of the constituent carboxylic acids which underwent dehydration to form the compound. In symmetrical acid anhydrides, where only one constituent carboxylic acid was used to form the compound (such as the dehydration of propanoic acid, 2CH3CH2COOH → CH3CH2C(O)OC(O)CH2CH3 + H2O), only the prefix of the original carboxylic acid is used and the suffix "anhydride" is added. In asymmetrical acid anhydrides, where two different carboxylic acids were used to give the anhydride (for example, the dehydration between benzoic acid and propanoic acid, C6H5COOH + CH3CH2COOH → C6H5C(O)OC(O)CH2CH3 + H2O), the prefixes from both acids reacted are listed before the suffix, in this case giving benzoic propanoic anhydride, which may alternatively be referred to as benzenecarboxylic propanoic anhydride.[1]

See also

References

  1. ^ "Nomenclature of Anhydrides". 8 November 2013.

acid, anhydride, acid, anhydride, type, chemical, compound, derived, removal, water, molecules, from, acid, organic, chemistry, organic, acid, anhydrides, contain, functional, group, organic, acid, anhydrides, often, form, when, equivalent, water, removed, fro. An acid anhydride is a type of chemical compound derived by the removal of water molecules from an acid In organic chemistry organic acid anhydrides contain the functional group R CO O CO R Organic acid anhydrides often form when one equivalent of water is removed from two equivalents of an organic acid in a dehydration reaction In inorganic chemistry an acid anhydride refers to an acidic oxide an oxide that reacts with water to form an oxyacid an inorganic acid that contains oxygen or carbonic acid or with a base to form a salt Nomenclature EditThe nomenclature of organic acid anhydrides is derived from the names of the constituent carboxylic acids which underwent dehydration to form the compound In symmetrical acid anhydrides where only one constituent carboxylic acid was used to form the compound such as the dehydration of propanoic acid 2CH3CH2COOH CH3CH2C O OC O CH2CH3 H2O only the prefix of the original carboxylic acid is used and the suffix anhydride is added In asymmetrical acid anhydrides where two different carboxylic acids were used to give the anhydride for example the dehydration between benzoic acid and propanoic acid C6H5COOH CH3CH2COOH C6H5C O OC O CH2CH3 H2O the prefixes from both acids reacted are listed before the suffix in this case giving benzoic propanoic anhydride which may alternatively be referred to as benzenecarboxylic propanoic anhydride 1 See also EditBase anhydride an oxide that reacts with water to form a hydroxide saltReferences Edit Nomenclature of Anhydrides 8 November 2013 This set index article lists chemical compounds articles associated with the same name If an internal link led you here you may wish to change the link to point directly to the intended article Retrieved from https en wikipedia org w index php title Acid anhydride amp oldid 1139978262, wikipedia, wiki, book, books, library,

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