4000 Alkane Alkene Terminal alkyne (internal alkynes lack unique bands) Alcohol Ether Primary amine Secondary amine Nitnle Aldehyde Ketone Carboxylic acid Ester 3500 Requirement: Use the table below to identify functional groups occurring at peaks 3232 cm-¹ and 1637 cm¹ respectively. Table 1. IR Absorption Bands of Functional Groups in Organic Compounds Wavenumber Functional Group (cm¹) Amide Aromatic Nitro 3000 2850-3000 1450-1470 1370-1380 800-1200 730-725 3050-3140 1620-1680 900-1000 3300-3320 2100-2140 600-700 3200-3600 3600-3700 1000-1200 1050-1150 3300-3400 3200-3400 2220-2280 1700-1720 2700-2850 1700-1720 1700-1720 3000 1730-1750 1000-1300 1650-1690 3200-3400 Data results 3000-3150 1750-1950 2500 600-900 1550 and 1400 2000 Wavenumber [cm¹] Comments C-H stretch for sp carbon (Strong) C-H bend (Strong) C-H methyl umbrella bend (Medium) C-C stretch (many medium bands) C-H bend (Medium) C-H stretch for sp carbon (Medium) CC stretch (Medium) C-H bend (Strong) 1500 C-H stretch for sp carbon (Medium) CC stretch (medium) C-H bend (Strong) H-bonded O-H stretch (Broad strong band) Free O-H stretch (sharp medium band, present only in dilute samples) C-O stretch (strong, higher v for more substituents on carbon) C-O stretch N-H stretch (two medium bands) N-H stretch (single medium band) NC stretch (medium) CO stretch (Strong) (lower v for conjugated) Aldehyde C-H stretch, two medium hands 1000 CO stretch (Strong) dlower y for coniugated) CHO stretch (Strong) (lower v for conjugated) O-H stretch (very broad band, usually with a spike of sp'C-H stretch in the middle) CO stretch (Strong) (lower v for conjugated) C-O stretch CO stretch (Strong) (lower v for conjugated) N-H stretch (two bands for primary, one for secondary, none for tertiary amide) C-H stretch (variable) C-H bending overtone region (usually several weak bands of similar strength) C-H bend (strong) "Walrus teeth" N-O stretch hands 500
4000 Alkane Alkene Terminal alkyne (internal alkynes lack unique bands) Alcohol Ether Primary amine Secondary amine Nitnle Aldehyde Ketone Carboxylic acid Ester 3500 Requirement: Use the table below to identify functional groups occurring at peaks 3232 cm-¹ and 1637 cm¹ respectively. Table 1. IR Absorption Bands of Functional Groups in Organic Compounds Wavenumber Functional Group (cm¹) Amide Aromatic Nitro 3000 2850-3000 1450-1470 1370-1380 800-1200 730-725 3050-3140 1620-1680 900-1000 3300-3320 2100-2140 600-700 3200-3600 3600-3700 1000-1200 1050-1150 3300-3400 3200-3400 2220-2280 1700-1720 2700-2850 1700-1720 1700-1720 3000 1730-1750 1000-1300 1650-1690 3200-3400 Data results 3000-3150 1750-1950 2500 600-900 1550 and 1400 2000 Wavenumber [cm¹] Comments C-H stretch for sp carbon (Strong) C-H bend (Strong) C-H methyl umbrella bend (Medium) C-C stretch (many medium bands) C-H bend (Medium) C-H stretch for sp carbon (Medium) CC stretch (Medium) C-H bend (Strong) 1500 C-H stretch for sp carbon (Medium) CC stretch (medium) C-H bend (Strong) H-bonded O-H stretch (Broad strong band) Free O-H stretch (sharp medium band, present only in dilute samples) C-O stretch (strong, higher v for more substituents on carbon) C-O stretch N-H stretch (two medium bands) N-H stretch (single medium band) NC stretch (medium) CO stretch (Strong) (lower v for conjugated) Aldehyde C-H stretch, two medium hands 1000 CO stretch (Strong) dlower y for coniugated) CHO stretch (Strong) (lower v for conjugated) O-H stretch (very broad band, usually with a spike of sp'C-H stretch in the middle) CO stretch (Strong) (lower v for conjugated) C-O stretch CO stretch (Strong) (lower v for conjugated) N-H stretch (two bands for primary, one for secondary, none for tertiary amide) C-H stretch (variable) C-H bending overtone region (usually several weak bands of similar strength) C-H bend (strong) "Walrus teeth" N-O stretch hands 500
Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions
Section20.3: Uv-visible Spectroscopy
Problem 20.5P
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Question
Please identify the functional groups of the peaks in FTIR
![4000
Alkane
Alkene
Terminal alkyne (internal
alkynes lack unique bands)
Alcohol
Ether
Primary amine
Secondary amine
Nitrile
Aldehyde
Ketone
Carboxylic acid
Ester
Amide
3500
Aromatic
Nitro
Table 1. IR Absorption Bands of Functional Groups in Organic Compounds
Functional Group
3232
Carbon dioxide
3000
Requirement: Use the table below to identify functional groups occurring at peaks 3232 cm-¹
and 1637 cm¹ respectively.
Wavenumber
(cm'¹)
2850-3000
1450-1470
1370-1380
800-1200
730-725
3050-3140
1620-1680
900-1000
3300-3320
2100-2140
600-700
3200-3600
3600-3700
1000-1200
1050-1150
3200-3400
3200-3400
2220-2280
1700-1720
2700-2850
1700-1720
1700-1720
3000
1730-1750
1000-1300
1650-1690
3200-3400
3000-3150
1750-1950
Data results
600-900
1550 and 1400
2500
2350
2000
Wavenumber [cm]
1637
1482
Comments
C-H stretch for sp carbon (Strong)
C-H bend (Strong)
C-H methyl umbrella bend (Medium)
C-C stretch (many medium bands)
C-H bend (Medium)
1500
C-H stretch for sp² carbon (Medium)
C-C stretch (Medium)
C-H bend (Strong)
C-H stretch for sp carbon (Medium)
C=C stretch (medium)
C-H bend (Strong)
C-O stretch
N-H stretch (two medium bands)
N-H stretch (single medium band)
NC stretch (medium)
H-bonded O-H stretch (Broad strong band)
Free O-H stretch (sharp medium band, present
only in dilute samples)
C-O stretch (strong, higher v for more
substituents on carbon)
C-O stretch (Strong) (lower v for conjugated)
Aldehyde C-H stretch, two medium bands
C-O stretch (Strong) (lower y for conjugated)
CO stretch (Strong) (lower v for conjugated)
O-H stretch (very broad band, usually with a
spike of sp³ C-H stretch in the middle)
C-O stretch (Strong) (lower v for conjugated)
C-O stretch
C-O stretch (Strong) (lower v for conjugated)
N-H stretch (two bands for primary, one for
secondary, none for tertiary amide)
C-H stretch (variable)
C-H bending overtone region (usually several
weak bands of similar strength)
C-H bend (strong)
"Walrus teeth" N-O stretch bands
Doublet (positive or negative, depending on
variation in local concentration between
baseline and sample measurement)
796
1000
MSE 364/METE 358, Materials/Metallurgical Laboratory II, Materials Engineering Department,
KNUST, Kumasi
559
500](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fbbadf441-d521-4343-bf48-c68533febc01%2Ff323ff79-5fd2-43c2-8756-5b298caf28fc%2Fezdrbnp_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4000
Alkane
Alkene
Terminal alkyne (internal
alkynes lack unique bands)
Alcohol
Ether
Primary amine
Secondary amine
Nitrile
Aldehyde
Ketone
Carboxylic acid
Ester
Amide
3500
Aromatic
Nitro
Table 1. IR Absorption Bands of Functional Groups in Organic Compounds
Functional Group
3232
Carbon dioxide
3000
Requirement: Use the table below to identify functional groups occurring at peaks 3232 cm-¹
and 1637 cm¹ respectively.
Wavenumber
(cm'¹)
2850-3000
1450-1470
1370-1380
800-1200
730-725
3050-3140
1620-1680
900-1000
3300-3320
2100-2140
600-700
3200-3600
3600-3700
1000-1200
1050-1150
3200-3400
3200-3400
2220-2280
1700-1720
2700-2850
1700-1720
1700-1720
3000
1730-1750
1000-1300
1650-1690
3200-3400
3000-3150
1750-1950
Data results
600-900
1550 and 1400
2500
2350
2000
Wavenumber [cm]
1637
1482
Comments
C-H stretch for sp carbon (Strong)
C-H bend (Strong)
C-H methyl umbrella bend (Medium)
C-C stretch (many medium bands)
C-H bend (Medium)
1500
C-H stretch for sp² carbon (Medium)
C-C stretch (Medium)
C-H bend (Strong)
C-H stretch for sp carbon (Medium)
C=C stretch (medium)
C-H bend (Strong)
C-O stretch
N-H stretch (two medium bands)
N-H stretch (single medium band)
NC stretch (medium)
H-bonded O-H stretch (Broad strong band)
Free O-H stretch (sharp medium band, present
only in dilute samples)
C-O stretch (strong, higher v for more
substituents on carbon)
C-O stretch (Strong) (lower v for conjugated)
Aldehyde C-H stretch, two medium bands
C-O stretch (Strong) (lower y for conjugated)
CO stretch (Strong) (lower v for conjugated)
O-H stretch (very broad band, usually with a
spike of sp³ C-H stretch in the middle)
C-O stretch (Strong) (lower v for conjugated)
C-O stretch
C-O stretch (Strong) (lower v for conjugated)
N-H stretch (two bands for primary, one for
secondary, none for tertiary amide)
C-H stretch (variable)
C-H bending overtone region (usually several
weak bands of similar strength)
C-H bend (strong)
"Walrus teeth" N-O stretch bands
Doublet (positive or negative, depending on
variation in local concentration between
baseline and sample measurement)
796
1000
MSE 364/METE 358, Materials/Metallurgical Laboratory II, Materials Engineering Department,
KNUST, Kumasi
559
500
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