Product NameIbuprofen
CAS15687-27-1
Molecular FormulaC13H18O2
Molecular Weight206.28
InChIInChI=1S/C13H18O2/c1-9(2)8-11-4-6-12(7-5-11)10(3)13(14)15/h4-7,9-10H,8H2,1-3H3,(H,14,15)
InChIKey HEFNNWSXXWATRW-UHFFFAOYSA-N
SmilesC1(C=CC(CC(C)C)=CC=1)C(C)C(=O)O

Mass
MS-IW-2149 2-(p-isobutylphenyl)propionic acid C13H18O2 (Mass of molecular ion: 206)
Source Temperature: 220 °C Sample Temperature: 160 °C Reservoir, 75 eV
18.0 1.5
27.0 3.7
29.0 1.8
39.0 4.4
41.0 9.2
43.0 9.5
45.0 1.0
51.0 2.7
53.0 1.4
55.0 1.8
57.0 3.6
63.0 2.0
65.0 3.5
77.0 6.3
78.0 2.4
79.0 2.9
89.0 1.9
91.0 46.7
92.0 4.2
93.0 1.4
102.0 1.3
103.0 4.9
104.0 3.6
105.0 9.3
106.0 1.0
107.0 28.1
108.0 2.2
115.0 8.8
116.0 3.2
117.0 25.3
118.0 19.6
119.0 44.3
120.0 4.7
128.0 2.6
129.0 1.5
131.0 2.5
133.0 2.1
145.0 5.5
146.0 1.0
159.0 1.3
161.0 96.9
162.0 13.2
163.0 100.0
164.0 23.7
165.0 2.3
177.0 1.6
191.0 1.9
206.0 45.9
207.0 6.6
400 MHz in CDCl3

| 1H NMR | 399.65 MHz |
| C13 H18 O2 | 0.047 g : 0.5 ml CDCl3 |
| 2-(p-isobutylphenyl)propionic acid | |
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Assign. Shift(ppm) |
Hz ppm Int.
2886.89 7.224 502
2879.38 7.205 527
2838.90 7.104 508
2830.84 7.084 377
1487.68 3.723 25
1480.53 3.705 80
1473.39 3.687 82
1466.25 3.669 28
978.11 2.448 260
970.97 2.430 276
747.50 1.871 28
740.73 1.854 55
733.95 1.837 69
727.35 1.820 56
720.39 1.803 29
597.86 1.496 438
590.53 1.478 431
358.82 0.898 1000
352.23 0.882 979
in CDCl3

KBr disc

nujol mull


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