Lab 1 - M. Farrell Matt Farrell September 19, 2006 Lab 1:...

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M. Farrell Matt Farrell September 19, 2006 Lab 1: Synthesis of N-Acetylanthranilic Acid: A Triboluminescent Material Purpose: The purpose of this lab is to make N-Acetylanthranilic acid. In this lab it is required to obtain the melting point range using a Melt-Temp instrument. Our final product should crystallize the acid and determine if what we made was triboluminescent. Background: When anthranilic acid is combined with acetic anhydride a product is formed known as an intermediate, benzisoxazinone, which immediately hydrolyzes to form a crystalline product. Once the crystals are cleaned, isolated, and dried the product becomes luminescent in the dark. This characteristic of “glowing” is also known to be called triboluminescent. Pre-Lab Data: Anthranilic acid FW= 137 g/mol Page 1 of 5
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M. Farrell N-acetylanthranilic FW= 179 g/mol Procedure: Weigh out 2.01 grams of anthranilic acid. Measure 6 mL of anhydride. Combine the acid and anhydride before heating. Observation: Initially acid was clear and anhydride was sandy and brown in color. Warm on hot plate for 15 minutes. Observation: After boiling, the solution was an amber color with no solid remaining.
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Lab 1 - M. Farrell Matt Farrell September 19, 2006 Lab 1:...

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