What different functional groups can you identify? How many Carbonyl C=O signals
ID: 870119 • Letter: W
Question
What different functional groups can you identify?
How many Carbonyl C=O signals can you see, and at what
cm-1 do these appear?
IR-Spectrum 100KME LOD 5D 4000 3000 2000 1500 1000 500 /cm! 3006 62 2689 6 1436 66 1222 918 26 2983 62 2548 6B1420 47 1190 841 50 2891 82 1754 9 1372 55 1136 5 605 52 2872 6211693 | 1308 10 | io96 6 | 766 41 2834 62 1606 14 1295 281014 57 706 46 2701 06 | 1463 64 | 127 84 | 97 70 | 667 52 2667 4 2670 66 1469 271267 64 928 62 600 68 2122 10gs S816 9887766 2 56576 2939172 6451206 2222266 3222222 1Explanation / Answer
Peak at 3006 coresponds to hydroxyl group;
2986,2891- stretching vibrations of CH3, CH2, CH
2872, 2834- CH2 Asymmetric stretching
2701, 2670, 2688, 2548- for Aldehyde
1754- Carbonyl stretching
1693, 1606- Amide
1483, 1469- CH2 Scissor
1436, 1420- alpha CH2 Bending
1372, 1308- alpha CH3 Bending
1295, 1272- O-C linkage of Acids
1267- CH2 Rocking
1222- Alkanes
1190- CH2 Wagging
918,841,805,766- CH-Bending
706,667- CH2 Rocking Bending
667, 600- C-H deformation
Carbonyl C=O signals: Only one carbonyl signal is vissible at 1754 cm-1
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