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Questions about synthetic esters

2009-08-13View Original

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What are the methods for synthesizing esters, such as the reaction between acids and alcohols and transesterification? What are the reaction conditions for each method, what are the products of these reactions, and which method is generally the most suitable?
Reply #22009-08-13
Generally, lower-grade esters are synthesized through an esterification reaction between alcohols and acids in the presence of a catalyst; this reaction is reversible. To drive the reaction in the forward direction, an excess of one of the reactants is generally used, and the water produced by the reaction is removed promptly. Higher esters are generally formed through an ester exchange reaction between lower esters and higher alcohols, with the resulting lower alcohols being removed from the system promptly.
Reply #32009-08-13
Acid (anhydride) + alcohol — ester, esterification. Ester1 + alcohol1 — ester2 + alcohol2, transesterification. Soap + halide — ester + salt
Reply #42009-08-13
Bro, this seems to be a problem that even a high school student can solve. Acids and alcohols react when heated to form esters; in esterification, esters and alcohols produce another ester plus an alcohol. Transesterification involves the reaction of soaps with halogenated alkanes to form esters and salts

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