1 - In this lab, benzil was synthesized from benzoin. My...

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In this lab, benzil was synthesized from benzoin. My benzoin NMR spectra is similar to the books in the fact that the most highly integrated peak is located at about 7.5 ppm. The splitting here is caused by the locations of the hydrogen atoms on the aromatic ring, and of their proximity to the alcohol and ketone groups. These results lead me to believe that the benzoin produced was mostly pure. Also, by comparing the results of my IR spectra to the IR spectra of the book, I can conclude that my benzil product is pure because the peaks on both spectra are almost identical. The addition of TLC chromatography to test the purity of my benzil product also helps me confirm the purity of the product. After heating the benzil product looked more like pure benzil because the “tail-like” appearance which was more closely located near benzoin diminished. This reaction is catalyzed by copper (II) acetate reduces an alcohol group to form a ketone. 1.
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This note was uploaded on 05/07/2008 for the course CHEMISTRY 203 taught by Professor Dill during the Spring '08 term at BU.

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1 - In this lab, benzil was synthesized from benzoin. My...

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