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Condensation reaction - Wikipedia, the free encyclopedia (377 words) |
 | A condensation reaction (also known as a dehydration reaction or dehydration synthesis when water is lost) is a chemical reaction in which two molecules or moieties react and become covalently bonded to one another by the concurrent loss of a small molecule, often water, methanol, or a type of hydrogen halide such as HCl. |
| It may be considered as the opposite of a hydrolysis reaction (the cleavage of a chemical entity into two parts by the action of water). |
| The reactions that form acid anhydrides from their constituent acids are typically condensation reactions. |
| Intramolecular Dehydration (541 words) |
| In this reaction the alcohol is heated in the presence of sulfuric acid. |
| Those earlier ionic reactions were taking place in aqueous solution where the concentration of water was so large (about 55 moles per liter) that the formation or reaction of water had very little effect upon the position of equilibrium. |
| As I pointed out earlier, this kind of dehydration reaction in which you form an alkene from an alcohol is called intramolecular dehydration because all of the atoms for the water molecule came from the same alcohol molecule. |
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