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Results and Discussion-Friedel-Crafts

Results and Discussion-Friedel-Crafts - mixture when using...

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Results and Discussion We began our experiment with .313 grams of 1,4-dimethoxy benzene. As we added the sulfuric acid drop wise, the mixture began turning yellow. As we added the methanol and ethanol to the solution, the substance turned a bright purple color. The first suction filtration produced white and tan crystals, the second produced white crystals. The melting point of this product was 75-80ºC. The weight of the crystals was .313 grams giving a 54.1 percent yield. Conclusion The observed melting point was 75-80ºC. This is significantly lower than the products literature value of 104-105 ºC. This huge difference is due to impurities in our product. These impurities could have resulted from not removing all of the liquid out of the
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Unformatted text preview: mixture when using out Pasteur pipette. It was probably ethanol left on the crystals that had not completely evaporated. Despite the presence of impurities, our percent yield was suitable. Questions 1. Would it be possible to form 1,4-di-t-butyl-2,5-dimethoxybenzene by treating 1,4-dimethoxy benzene with a four carbon alkene and sulfuric acid? Show with mechanism, why you answered yes or no. 2. What would the product have been if cyclohexanol had been substituted for t-butyl alcohol? 1,4-dicyclohexanol-2,5-dimethoxybenzene. 3. What would the product of the reaction have been if 1,3-dimethoxybenzene had been substituted for 1,4-dimethoxybenzene? 1,5-di-t-butyl-2,4-dimethoxybenzene....
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