February 10, 2013
This experiment was done to demonstrate the practical use of dehydration reactions and produce three different products. Dehydration reactions are reactions that involve the leaving of an “-OH” or “-H” group resulting in the formation of a double bond between two carbons. For the experiment we used 2-Methylcyclohexanol as a beginning reagent to dehydrate and possibly form 3-methylcyclohexene, 1-methylcyclohexene, or methylenecyclohexane. Drierite® (Calcium Sulfate) was used as a drying agent to help break the alcohol and hydrogen groups from the carbons. Concentrated phosphoric acid was used as a catalyst to help move the reaction towards the products motioned above. To determine the successfulness of the experiment and the amount of product(s) recovered, IR spectroscopy, Gas Chromatography and percent yield calculations were used. Equations and Structures
1. "18. Dehydration of 2- Methylcyclohexanol." Organic Chemistry Lab 2040L. XU Chemistry, n.d. Web. 12 Feb. 2013. 2. "Material Safety Data Sheet 2-Methylcyclohexanol." Http://www.coleparmer.com/Assets/Msds/97403.htm. Coleparmer, 19 Mar. 1998. Web. 12 Feb. 2013. 3. "Material Safety Data Sheet Methylcyclohexane." Sciencelab.com. Science Lab, 09 Oct. 2005. Web. 12 Feb. 2013. 4. Helmenstine, Anne M., Ph.D. "How to Write a LabÂ Report." About.com Chemistry. About.com Guide, n.d. Web. 23 Feb. 2013. . 5. "Theoretical Yield." Theoretical Yield. Ed. University of Colorado at Boulder. Department of Chemistry and Biochemistry, n.d. Web. 23 Feb. 2013. .
Chemicals In Experiment| B.P.| Amount Used| **Observations| 2-Methylcyclohexanol| 164-166°C | 0.75mL| Colorless liquid that had similar smell to gasoline.| Calcium Sulfate (Drierite®)| 1193°C| Half Hickman Still| White powder that resembled kitty litter.| Phosphoric Acid| 158°C| Approx. 1mL| Clear liquid & Odorless|...