Question

Identify all of the major peaks within the IR spectrum and attempt to identify the compound.

PerkinElmer Spectrum Version 10 03 07 Tuesday, July 23, 2019 4 34 PM alyst User Tuesday, July 23, 2019 4:34 PM 1958.46cm-1, 83.35%TM 2973.93cm-1, 81.71%T 3027 11cm-1.77.63% 3054.87cm-1, 78.72%T 1673.08cm 1.78 45% 1698.60cm-1. 72.82% 1259 64cm-1 68.579T| 1.849.bicn-18666%T AM 828.13¢m-1.65 24%T IN 1025.cm 61 99% 130 780m 1,59 20T IN 1484&bcm-1.56.00%T ||| 923.78cm-1 62.27% 1625 210 56.06%T 107 88cm-1, 64.50%T 1447.78cm-1, 50,68% 384.08cm-1, 54954 1334.22cm-1, 51,67% 1099.39cm-1, 54.54%T 1191.65cm-1.44.64T 1573.9cm-1. 41.90%T 676. 18cm-1, 41.80%T 1590.0 cm-1, 40.32%T 1649.43cm-1. 36.42%T 1158.66cm-1, 56.46%T 1283.86cm-1.62.36%T 752.98cm-1, $2.38%T 760.75cm-1, 27.86%T 980.77cm-1, 27.88%T 692.41cm-1, 13.18% 3500 3000 2000 2500 cm-1 1500 1000 650 User 335 Sample 335 By User Date Tuesday, July 23 2019

Answer 1

From IR peaks it is very difficult to identify a compound accurately. For final identification we need at least a 2D NMR spectra, but here I will try to identify the major peaks and will give a overview what compound it might be possible to draw. First it is showing a distinct characteristic peaks at 2973.93, 2027.11 and 3054.87 which is clearly indicating that there is a primary amine group as it is shaped like two weak finger type peaks. Again come to the 1673.08 and 1696.60 it is indicating there is C=O bond but it should be an amide bond (RCONH₂ or RCONHR), as C=O stretching frequency of amide bond typically lies between 1670 to 1640. There might be any C=C bond as its stretching frequency comes between 1680 to 1630. As we can also see C-N stretching frequency which is lied between 1080-1360. So from spectrum we can assume that it is an aliphatic amide as there is no distinct aromatic peak is there it should be aliphatic.