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Wednesday, April 26 • 8:30am - 10:00am
Unimolecular decomposition and disproportionation-combination rate constant ratios of CHCl2CHCl2 through combination of CHCl2 radicals

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In this experiment, dichloroiodomethane was synthesized using sodium iodide and chloroform. An aqueous potassium hydroxide solution was used as a solvent, while 18-crown-6 was used as a catalyst to separate organic and inorganic compounds in the reaction. The reaction was performed at a temperature of 0°C with constant stirring for 2 days. The solution was diluted with excess amount of ice water then separated. A yellow solution was observed and Roto-Vap until the solution turn dark orange. Nuclear Magnetic Resonance (NMR) was used to identify dichloroiodomethane in the solution, while Gas chromatography/Mass spectrometry (GC/MS) was used to analyze the ratio of chloroform and dichloroiodomethane in the solution. The NMR reading showed that dichloroiodomethane was formed in the reaction. Mass spectrograph also confirmed that dichloroiodomethane was prepared. Based on the NMR reading and mass spectrograph, the reaction produced a sufficient amount of dichloroiodomethane for use in further experiment. Dichloroiodomethane will be look at to determine if a photolysis reaction with mercury (I) iodide is possible to produce two CHCl2 radicals. If the production of the CHCl2 radicals is possible, we will study the formation of CHCl2CHCl2 by combination of the two CHCl2 radicals. Further studies will look at different pathways that CHCl2CHCl2 can undertake when chemically activated. Pathways such as 1,1-HCl elimination and 1,2-HCl elimination will be examined through reaction rate, threshold energies, and product ratio.


Wednesday April 26, 2017 8:30am - 10:00am
Concourse - Wilma Sherrill Center