4-Methylcyclohexene

When comparing the theoretical yield versus the actual yield, the results obtained deviated slightly from what was expected; the percent yield was 81.53% and approximately one gram of product was lost. Steps that most likely resulted in loss of product could be due to volatility of the product. The experiment required several transferring methods causing the products to be exposed to air and allowing evaporation when it was not covered. The literature boiling point for 4-methylcyclohexene is 101-102 °C; however, the observed boiling point in this experiment was 91-98 °C. This is not too much of a difference resulting in the purity of the product being fairly pure. Furthermore, the observed boiling point was more than likely lower than the literature boiling point due to the
When 4-methylcyclohexanol was combined with the bromine solution, the mixture turned into a light yellow color versus 4-methylcyclohexene with the bromine solution being colorless; the initial color for 4-methylcyclohexanol was combined with the bromine solution was a light orange/brown color. The solution being colorless indicated a positive sign of a double bond being present in 4-methylcyclohexene. The second test used potassium permanganate solution to test for the presence of alcohol. When 4-methylcyclohexanol was mixed with the potassium permanganate solution, the color changed from a clear solution to deep dark purple color. When the potassium permanganate solution was combined with 4-methylcyclohexene the color changed to brown, indicating the presence of the desired product. When examining the boiling point and retention time of 4-methylcyclohexanol, the retention time was 1.899 minutes and the boiling point was 171-173 °C. The 4-methylcyclohexene had an observed boiling point of 91-98 °C, and the retention time was 2.033