2_9 - 2/8/2010 Chapter 16 An ester is a carboxylic acid...

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2/8/2010 1 Chapter 16 An ester is a carboxylic acid derivative in which the OH portion of the carboxyl group has been replaced with an OR group. The simplest ester, which has two carbon atoms, has a hydrogen atom attached to the ester functional group.
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2/8/2010 2 Esters are produced by an esterification reaction. Esterification reaction: Reaction of a carboxylic acid with an alcohol (or phenol) to produce an ester. Esterification reaction require a strong acid catalyst such as H 2 SO 4 . It is often useful to think of the structure of an ester in terms of its ―parent‖ alcohol and acid molecules. Acid Alcohol
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2/8/2010 3 Esterification reactions are equilibrium processes with the position of equilibrium usually favoring products only slightly. The amount of ester formed can be increased by using an excess of alcohol or by constantly removing one of the products. According to Le Chatelier’s principle either of these
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2_9 - 2/8/2010 Chapter 16 An ester is a carboxylic acid...

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