Solid Unknow description.docx - Rachel Monken Unknown...

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Rachel MonkenUnknown number: S-025The unknown solid number was S-025, and its melting range was 161-164. Fromanalyzing all the data, I concluded that my solid unknown was benzanilide (C13H11NO) with aCAS # of 93-98-1 containing a melting point range of 161-163 almost matching perfectly withthe melting point given. First, I used the IR spectra to analyze my unknown solid. By looking atthe different absorptions and their intensities, I was able to identify some importantinformation that would help me uncover my unknown. The first absorption was at 3341.91which indicated that there was an N-H amine stretch taking place. The secondary amine for N-Honly had one stretch frequency since there was only one N-H bond. There was another smallpeak at 3050.46 which was in the double bond region of the spectrum indicating a double bondC-H stretch, alkene C-H, and Csp2-H bond. If it were lower than 3000 it would’ve been a Csp3-Hbond but since it is slightly above 3000 is it a double bond C-H stretch. The next coupleimportant absorptions were all strong absorptions around 1652.84, 1598.02, 1578.87, and1524.23. I did not look past those numbers due to the fact that anything under 1500 wasconsidered the fingerprint region and would not help me as much identify what my unknownwas. The absorption at 1652.84 helped me identify that my molecule also contained at least 1benzene ring and RCONHR having a C=O within that structure. There was increasingwavenumber with decreasing ring size. The absorption at 1598.02 indicated that this was anaromatic C=C bond. Around 1600 and around 1500 is the indication of a benzene ring. Next, Ilooked at the HNMR spectrum to help further my analysis of my unknown solid. The parent

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Term
Fall
Professor
Humason,A
Tags
Benzene, Aromatic hydrocarbon, Electrophilic aromatic substitution, HNMR peak

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