IR Spectroscopy - IR Spectroscopy In our first compound or...

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IR Spectroscopy: In our first compound or scan number 58, we matched the scan to compound number 5, the amide. The first sign that it was an amide/amine was the N-H bond at around 300. There was only one band so we knew it was a secondary H. The presence of sp2 and sp3 C-H bond were also present but the determining factor in this structure was the tell-tale amide bond at about 1650. In out next scan #47, we matched it up to compound #7. At first glance it closely resembled compound #5 discussed previously due to the amine/amide peak at 3414 and both sp2 and sp3 C-H bonds present. In this structure, however, the 3 peaks around 1925 indicated to us the presence of an aromatic ring and thus helped us determine the compound. For our unknown compound #31, the presence of the 3 peaks indicating an aromatic ring helped us significantly in narrowing down our choices. We see some sp2 as well as sp3 C-H bonds and the peak at 1685 indicated the presence of a conjugated ketone. Through these observations we were able to pair up compound #31 with structure #3.
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