Anhydrides

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Anhydrides are the chemical reaction of two carboxylic acids, which produces an acid anhydride and a water molecule.

CH3CH2COOH + CH3CH2COOH → CH3CH2COOCOCH2CH+ H2O
propanoic acid + propanoic acidhexanoic anhydride (propanoic propanoic anhydride)

Acid anhydrides are significant in organic chemistry as acid anhydrides are involved in esterification with alcohol as a reagent without an catalyst to form an ester[1].

(C2H5CO)2O + CH3 CH2OH → CH3CH2COOH + CH3CH2COCH2CH3

hexanoic anhydride + ethanol → propanoic acid + ethyl propanoate

propanoic propanoic anhydride

Esters are used for industrial purposes as such as flavouring and perfumes.

References

  1. N. Goaly https://chemrevise.files.wordpress.com/2018/11/6-1-3-revision-guide-carboxylic-acids-and-esters.pdf view online 05/12/2018
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