ochem2 lab 9

ochem2 lab 9 - Khoi Nguyen Lab 9 Title Williamson Ether...

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Khoi Nguyen Lab 9 Title: Williamson Ether Synthesis of Methylphenoxyacetic Acid Introduction In this experiment, a Williamson ether synthesis will be carried out to synthesize methylphenoxyacetic acid from a cresol and chloroacetic acid. The melting point of the product will be obtained to determine which cresol isomer was used. In the work up of this experiment, the isolation of the product from the organic layer involves the exploitation of the relatively lower acidity of phenol than the acidity of carboxylic acids. The lower acidity of phenols are due to the higher resonance stabilization of the phenoxide ion over the carboxylate ion. Table of Reagents mol. wt. (g/mol) bp (°C) density (g/mL) o-cresol 108.14 191 1.048 m-cresol 108.14 203 1.034 p-cresol 108.14 202 1.034 chloroacetic acid 94.5 mp 62-64 methylphenoxyacetic acid Safety Information - cresols are corrosive; wear gloves - KOH is a strong base and chloroacetic acid is a strong acid - put waste in appropriate waste containers Procedures
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ochem2 lab 9 - Khoi Nguyen Lab 9 Title Williamson Ether...

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