C-H bend 1470-1430 and 1375-1365 Alkenes =C-H stretch 3100-3010 C=C stretch 1680-1640 (sat.), 1630-1590 (conj. 995-685 C-H bend Alkynes =C-H stretch 3300-3200 C=C stretch 2250-2100 Aromatic C-H stretch 3080-3020 C=C stretch 1650-1580 C-H bend 900-680 Alcohols O-H stretch 3650-3550 3550-3300 1260-1000 C-O stretch Amines N-H stretch 3500-3100 3000 2000 IS00 1000 S00 Nitriles HAVENUMBERI CEN stretch 2280-2200 Aldehydes C-H stretch C-O stretch 2900-2820 and 2775–2700 1740-1720 (sat.), 1705-1680 (conj. Ketones C-O stretch 1725-1705 (sat.), 1685–1665 (conj.I `H Esters C-O stretch C-O stretch 1750-1735 (sat.), 1730–1715 (conj. H,C OCH,CH, 1250-1160 H,C Acids O-H stretch C=O stretch 3500-2500 Ethyl acetate 1725-1700 (sat.), 1715–1680 (conj.l p-Anisaldehyde Amides N-H stretch C-O sretch 3500-3150 1680-1630 Anhydrides C-O stretch C-O stretch 1850-1800 and 1790-1740 1050-900 `CH, Acid chlorides C=O stretch C 1820-1770 Nitro 1660-1490 and 1390-1260 NO, stretch Benzoic acid e a.s strong, m = medium, w = weak, br = broad b. sat. - saturated; conj, - conjugated
C-H bend 1470-1430 and 1375-1365 Alkenes =C-H stretch 3100-3010 C=C stretch 1680-1640 (sat.), 1630-1590 (conj. 995-685 C-H bend Alkynes =C-H stretch 3300-3200 C=C stretch 2250-2100 Aromatic C-H stretch 3080-3020 C=C stretch 1650-1580 C-H bend 900-680 Alcohols O-H stretch 3650-3550 3550-3300 1260-1000 C-O stretch Amines N-H stretch 3500-3100 3000 2000 IS00 1000 S00 Nitriles HAVENUMBERI CEN stretch 2280-2200 Aldehydes C-H stretch C-O stretch 2900-2820 and 2775–2700 1740-1720 (sat.), 1705-1680 (conj. Ketones C-O stretch 1725-1705 (sat.), 1685–1665 (conj.I `H Esters C-O stretch C-O stretch 1750-1735 (sat.), 1730–1715 (conj. H,C OCH,CH, 1250-1160 H,C Acids O-H stretch C=O stretch 3500-2500 Ethyl acetate 1725-1700 (sat.), 1715–1680 (conj.l p-Anisaldehyde Amides N-H stretch C-O sretch 3500-3150 1680-1630 Anhydrides C-O stretch C-O stretch 1850-1800 and 1790-1740 1050-900 `CH, Acid chlorides C=O stretch C 1820-1770 Nitro 1660-1490 and 1390-1260 NO, stretch Benzoic acid e a.s strong, m = medium, w = weak, br = broad b. sat. - saturated; conj, - conjugated
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Can you answer this questions regarding the IR absorbtion
Transcribed Image Text:LOD
TABLE 18.2
Characteristic infrared absorption peaks of functional groups
Vibration
Position (cm-')
Intensity
Comment
Alkanes
C-H stretch
C-H bend
2962-2853
m to s
1470-1430 and 1375–1365
m to w
Alkenes
=C--H stretch 3100–3010
C=C stretch
C-H bend
1680–1640 (sat.), 1630–1590 (conj.)
995-685
w to m
See Table 18.3 for detail.
Alkynes
=C-H stretch 3300-3200
50
C=C stretch
2250-2100
m to w
Aromatic
C–H stretch
3080-3020
m to w
C=C stretch
C-H bend
1650–1580
m to w
900-680
See Table 18.3 for detail.
Alcohols
0-H stretch
3650–3550
Free
3550-3300
br, s
Hydrogen bonded
C-O stretch
1260–1000
Amines
N-H stretch
3500-3100
br, m
1° (two bands), 2° (one band)
4D00
3000
2000
1500
1000
500
Nitriles
HAVENUMB ERI -|l
CEN stretch
2280–2200
Aldehydes
C-H stretch
C=O stretch
2900-2820 and 2775-2700
H-C=0
1740–1720 (sat.), 1705-1680 (conj.)
Ketones
C=0 stretch
1725–1705 (sat.), 1685–1665 (conj.)
Esters
`H
C=0 stretch
В
1750–1735 (sat.), 1730–1715 (conj.)
A
H,C
OCH,CH,
C-O stretch
1250–1160
H,C-o
Acids
Ethyl acetate
0-H stretch
C=0 stretch
3500–2500
1725–1700 (sat.), 1715–1680 (conj.)}
p-Anisaldehyde
Amides
N-H stretch
3500–3150
1° (two bands), 2° (one band)
m
C=0 stretch
1680–1630
Anhydrides
C=O stretch
(-O stretch
1850–1800 and 1790–1740
1050-900
`CH
ОН
Acid chlorides
C=0 stretch
1820–1770
D
Nitro
NO, stretch
1660–1490 and 1390–1260
Benzoic acid
a. s= strong, m = medium, w = weak, br = broad
b. sat. = saturated; conj. = conjugated
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