chem262Lexp2

chem262Lexp2 - AtLee Watson Experiment 4: Nucleophilic...

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AtLee Watson Experiment 4: Nucleophilic Substitution: The Synthesis of 2-Methylphenoxyacetic Acid Upon the recrystallization the percent yield of the product, 2-methylphenoxyacetic acid was determined to be 9.25%. In this experiment 1.82 mmol of the limiting reagent sodium chloroacetate was weighed out, and from the S N 2 reaction and crystallization 0.162 mmol of product was collected. The low yield of the 2-methylphenoxyacetic acid product was due in large part to a small hole in the small disk used in the filter. This allowed the crystallized 2- methylpenoxyacetic acid to pass through as filtrate. Another cause for experimental error was due to the carboxylic acid dissolving in the crystallization solvent (water) during the filtration and wash steps. Therefore, a significant amount of the product was passed through the filter as filtrate and was not accounted for when weighing the final product. After the final product was weighed, the melting point of the product was determined to be 153.6
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This note was uploaded on 09/16/2008 for the course CHEM 262L taught by Professor Mbadugua during the Spring '08 term at UNC.

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chem262Lexp2 - AtLee Watson Experiment 4: Nucleophilic...

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