Chemical compound derived by removing water from an acid
"anhydride" redirects here. For other uses, see base 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 −C(=O)−O−C(=O)−. 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.
acidanhydride is a type of chemical compound derived by the removal of water molecules from an acid. In organic chemistry, organic acidanhydrides contain...
An organic acidanhydride is an acidanhydride that is also an organic compound. An acidanhydride is a compound that has two acyl groups bonded to the...
isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis. It is a colorless liquid that smells strongly of acetic acid, which...
Maleic anhydride is an organic compound with the formula C2H2(CO)2O. It is the acidanhydride of maleic acid. It is a colorless or white solid with an...
dioxide is also the anhydride of carbonic acid: H2CO3 → H2O + CO2 Chromium trioxide, which reacts with water forming chromic acid: CrO3 + H2O → H2CrO4...
sulfuric acid. SO2 + H2O + 1⁄2 O2 → H2SO4 Sulfur dioxide dissolves in water to give "sulfurous acid", which cannot be isolated and is instead an acidic solution...
Propanephosphonic acidanhydride (PPAA, T3P) is an anhydride of propanephosphonic acid. Its structure is a cyclic trimer, with a phosphorus–oxygen core...
Phthalic anhydride is the organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial...
Succinic anhydride, is an organic compound with the molecular formula (CH2CO)2O. This colorless solid is the acidanhydride of succinic acid. In the laboratory...
anhydride, also known as triflic anhydride, is the chemical compound with the formula (CF3SO2)2O. It is the acidanhydride derived from triflic acid....
and its anhydride. Citraconic acid can be produced via thermal isomerization of itaconic acidanhydride. The required itaconic acidanhydride is obtained...
produce a larger carboxylic acid. An unstable formic anhydride, H(C=O)−O−(C=O)H, can be obtained by dehydration of formic acid with N,N′-dicyclohexylcarbodiimide...
citraconic acid can be produced by thermal isomerization of itaconic acidanhydride to give citraconic anhydride, which can be hydrolyzed to citraconic acid. The...
maleic anhydride, which has many applications. Maleic acid has a heat of combustion of -1,355 kJ/mol., 22.7 kJ/mol higher than that of fumaric acid. Maleic...
Trifluoroacetic anhydride (TFAA) is the acidanhydride of trifluoroacetic acid. It is the perfluorinated derivative of acetic anhydride. Trifluoroacetic anhydride was...
derivative phthalic anhydride is a commodity chemical produced on a large scale. Phthalic acid is one of three isomers of benzenedicarboxylic acid, the others...
condensation of an aromatic aldehyde and an acid anhydride, in the presence of an alkali salt of the acid. The alkali salt acts as a base catalyst, and other...
same way, with anhydride replacing acid and IUPAC name consists of three words. For example, CH3CO−O−OCCH3 is called ethanoic anhydride and CH3CO−O−OCCH2CH3...
structural formula of (H(C=O)−)2O. It can be viewed as the anhydride of formic acid (HCOOH). Formic anhydride can be obtained by reaction of formyl fluoride with...
derivatives include acetic anhydride; this anhydride is produced by loss of water from two molecules of acetic acid. Esters of acetic acid can likewise be formed...
can be synthesized by condensation of phthalic anhydride with two equivalents of phenol under acidic conditions. It was discovered in 1871 by Adolf von...
H2O -> CF3SO3H + 5 HCl}}} Triflic acid is purified by distillation from triflic anhydride. Trifluoromethanesulfonic acid was first synthesized in 1954 by...
Acidanhydride hydrolases are a class of hydrolase enzymes that catalyze the hydrolysis of an acidanhydride bond. They are classified under EC number...
Benzoic anhydride is the organic compound with the formula (C6H5CO)2O. It is the acidanhydride of benzoic acid and the simplest symmetrical aromatic acid anhydride...
whereas phosphonium reagents are not. Since late 2000s, propanephosphonic acidanhydride, sold commercially under various names such as "T3P", has become a useful...
fatty acids and other components. Alkyds are derived from polyols and organic acids including dicarboxylic acids or carboxylic acidanhydride and triglyceride...
empirical formula, P2O5). This white crystalline solid is the anhydride of phosphoric acid. It is a powerful desiccant and dehydrating agent. Phosphorus...
Propionic anhydride is an organic compound with the formula (CH3CH2CO)2O. This simple acidanhydride is a colourless liquid. It is a widely used reagent...
formula WO3. The compound is also called tungstic anhydride, reflecting its relation to tungstic acid H2WO4. It is a light yellow crystalline solid. Tungsten(VI)...
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