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
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
Please identify the functional groups of the peaks in FTIR
Definition Definition Group of atoms that shape the chemical characteristics of a molecule. The behavior of a functional group is uniform in undergoing comparable chemical reactions, regardless of the other constituents of the molecule. Functional groups aid in the classification and anticipation of reactivity of organic molecules.
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