The Synthesis of Alkenes

The Synthesis of Alkenes - The Synthesis of Alkenes: The...

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The Synthesis of Alkenes: The Dehydration of Cyclohexanol Jacob Rietschy Chemistry 330 Nate Ware
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Introduction: Cyclohexene was synthesized from cyclohexanol. This was done using dehydration. The cyclohexene was tested for the presence of a carbon-carbon double bond by adding bromine. The bond was found to be present because when bromine was added, the solution turned clear after mixing. The product was then characterized using IR. Reactions/Mechanisms/Theory: Dehydration is what an elimination reaction is called when water is the leaving group. Dehydration is accomplished in this instance by the addition of H 3 PO 4. The H 3 PO 4 molecule breaks off the OH molecule from cyclohexanol. This makes H 2 O and H 2 PO 4 and cyclohexene. This reaction is shown in Figure 1. The mixture is heated during this reaction to promote the elimination reaction over substitution taking place because the two are at competition in a primary substrate. Water is extracted from the solution by adding anhydrous sodium sulfate, as it forms a complex with water. The bromine test was used to determine if the product has the carbon-carbon double bond
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This lab report was uploaded on 04/09/2008 for the course CHEM 0330 taught by Professor Forget during the Fall '07 term at Pittsburgh.

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The Synthesis of Alkenes - The Synthesis of Alkenes: The...

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