acid anhydrides
Oxford Dictionary of Chemistry:
Top
acid anhydrides
Variant: acyl anhydrides
Compounds that react with water to form an acid. For example, carbon dioxide reacts with water to give carbonic acid:
CO2(g)+H2O(aq)⇌H2CO3(aq)
A particular group of acid anhydrides are anhydrides of carboxylic acids. They have a general formula of the type R.CO.O.CO.R′, where R and R′ are alkyl or aryl groups. For example, the compound ethanoic anhydride (CH3.CO.O.CO.CH3) is the acid anhydride of ethanoic (acetic) acid. Organic acid anhydrides can be produced by dehydrating acids (or mixtures of acids). They are usually made by reacting an acyl halide with the sodium salt of the acid. They react readily with water, alcohols, phenols, and amines and are used in acylation reactions.
Acid anhydride
External Links:
- http://www.acdlabs.com/iupac/nomenclature/93/r93_534.htm -- Information about IUPAC nomenclature
Post a question - any question - to the WikiAnswers community:
Copyrights:
Oxford Dictionary of Chemistry
A Dictionary of Chemistry. Sixth Edition. Copyright © Market House Books Ltd, 2008. All rights reserved.
Read more
Mentioned in
cellulose acetate butyrate
(organic chemistry)
imide
(organic chemistry)
aquametry
(analytical chemistry)
Ketene
(organic chemistry)
» More