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Title: The preparation of cyclohexene from cyclohexanol. Objectives: To prepare cyclohexene from cyclohexanol by an elimination method and to test for unsaturation in product. To introduce the method of purification for an organic liquid. Introduction: The acid-catalyzed dehydration of an alcohol is an important method for the preparation of an alkene. It is also an example of an elimination reaction, which proceeds by a first order mechanism via an intermediate carbocation. In this experiment, cyclohexanol is dehydrated to cyclohexene n the presence of concentrated phosphoric acid: Distillation is employed in this experiment to synthesize and purify cyclohexene. The principle of distillation as a separation method is based on the difference in boiling points of substances. The identity and purity of the product can be checked by infrared spectroscopy and gas chromatography. Apparatus: Conical flask x 3 250cm3 beaker x 1 50cm3 pear-shaped flask x 1 Spatula x 1 Filter funnel x 1 150? thermometer x 1 Oil bath x 1 Test tubes...

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