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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.
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O, it is the simplest 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 is formed by its reaction with ...
A common type of organic acid anhydride is a carboxylic anhydride, where the parent acid is a carboxylic acid, the formula of the anhydride being (RC(O)) 2 O. Symmetrical acid anhydrides of this type are named by replacing the word acid in the name of the parent carboxylic acid by the word anhydride. [2] Thus, (CH 3 CO) 2 O is called acetic ...
Download as PDF; Printable version; ... In chemistry, acylation is a broad ... Acyl halides and acid anhydrides of carboxylic acids are also common acylating agents.
The Perkin reaction is an organic reaction developed by English chemist William Henry Perkin in 1868 that is used to make cinnamic acids.It gives an α,β-unsaturated aromatic acid or α-substituted β-aryl acrylic acid by the aldol condensation of an aromatic aldehyde and an acid anhydride, in the presence of an alkali salt of the acid.
First, the Lewis acid catalyst activates the TFBA, and then a carboxyl group in carboxylic acid reacts with the activated TFBA to produce mixed anhydride (MA) once. Then, a carbonyl group derived from the carboxylic acid in MA is selectively activated and is attacked by a hydroxyl group in the alcohol through intermolecular nucleophilic ...
A general linear imide functional group. In organic chemistry, an imide is a functional group consisting of two acyl groups bound to nitrogen. [1] The compounds are structurally related to acid anhydrides, although imides are more resistant to hydrolysis.
An acyl halide (also known as an acid halide) is a chemical compound derived from an oxoacid [1] by replacing a hydroxyl group (−OH) with a halide group (−X, where X is a halogen). [ 2 ] In organic chemistry , the term typically refers to acyl halides of carboxylic acids ( −C(=O)OH ), which contain a −C(=O)X functional group consisting ...