Cyclohexanol to Cyclohexene

Experiment 5: Preparation of Cyclohexene- Acid Catalyzed Elimination of Cyclohexanol

ballock State University

Organic Chemistry Lab 231 (Sec. 5)

Dr. Bock/Daniel Miller

Tiffany Raber

5 November 2012























Purpose:

To prepare an alkene by an elimination chemical reply of an alcohol in the presence of sulfuric acetous as a catalyst to produce a successful pay off and desired results for the purity of the alkene.

Introduction:

The dehydration of an alcohol much(prenominal) as cyclohexanol is a useful technique for generating alkenes. The success of this reaction relies on a dehydration, such as the presence of a strong acid (sulfuric acid). Because this reaction is reversible, a fractional distillation is necessary to produce cyclohexene, water, and some impurities and a simple distillation is followed to further purify the product.

[pic]

(Fig. 1- Cyclohexanol dehydrated by sulfuric acid to produce cyclohexene)

Procedure:

1. Mix five mL of Cyclohexanol and 2.5 mL of 9M sulfuric acid in a 25 mL flask.

2. Construct a fractional distillation apparatus (unpacked) part stirring the mixture and begin heating.

a. Heat slow

b.



Do non heat over 90-100 degrees Celcius

c. Ice water bath for distillation if desired

3. The distillate will be cloudy. Add anhydrous green carbonate in small amounts until it is no longer cloudy. conveyance to a 10 to 25 mL round do-nothing flask.

4. Construct a simple distillation making current all tools are dry and clean. The flask should be pre-weighed. Drying thermionic valve must be connected to a vacuum adapter by a hose.

a. Drying tube- clear, plastic tube filled with drying agent

5. later on distillation, record the mass of the distillate and calculate the percent yield.

6. Lastly, personate 10 drops of .1M bromine solution in...If you want to get a full essay, order it on our website: Ordercustompaper.com



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