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Acid Anhydrides

Acid anhydrides have important commercial uses. One of the acid anhydrides of such importance is acetic anhydride.

 

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Acetic anhydride can be synthesized by reacting a compound called ketene with acetic acid.
 
Sample reaction
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Cyclic anhydrides such as succinic anhydride, maleic anhydride, and glutaric anhydride can be prepared by heating the corresponding dicarboxylic acids. The reaction results in intramolecular dehydration and ring formation. Study the following example.
 
Sample reaction
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Reaction Involving Acid Anhydrides:
Acid anhydrides react with alcohols to form esters and carboxylic acids. A general equation representing this type of reaction is shown in the next sample reaction.
 
Sample reaction
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