Need help identifying this IR Spectra. The twin peaks I believe indicate NH2 whi

Question

Need help identifying this IR Spectra. The twin peaks I believe indicate NH2 which has me believe its an Amide but I'm having trouble identifying the full compound. I also recorded a melting point of approx. 127-131C though cannot seem to find a compound that matches.

Edit: For the Overlapping Peaks:

First Peak on the left is 3148.72 cm-1

Second Peak next to it is 3026.87 cm-1

In the Fingerprint Region the 3 overlapping Peak Numbers are:

1428.99 cm-1
1417.42 cm-1
1396.21 cm-1

ents. name nt my CSU SB 002.8 cm-1 2791.46 cm-1 b4 cm-1 935.306 cm- 29 cm-1 847.561 cm-1 1371.14 cm-1 1292.07 c 817.67 cm-1 1770.33 cm-1 1184.08 cm-1 1682.59 cm-1 1000 2000 3000 Wave number (cm-1] [Measurement Information] FT/IR-4100typeA Model Name Serial Number B025661016 Measurement Date 5/22/2017 12:00 PM Light Source Standard TGS Detector

Explanation / Answer

The twin peaks at 3026 cm-1 and 3172 cm-1 indicate the stretching frequency of unsubstituted N-H group in amide. The compound is an amide, since the most notable peak (the most intense) is at 1682 cm-1 and is due to the C=O group of the amide. The C=O group appears at slightly lower value than free C=O due to conjugation effect of NH2. The spectrum also contains a bunch of indiscernable peaks at 1400-1600 cm-1. These peaks are due to C=C vibrations of aromatic rings; therefore, the compound contains a phenyl ring.

The melting point of the compound falls between 127-131C. Therefore, the compound is most likely benzamide (m.p. = 127-131C). The structure of benzamide is as below:

Benzamide

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