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FTIR Functional Group Database Table with Search

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FTIR Functional Group Database Table with Search - InstaNANO. https://instanano.com/all/characterization/ftir/ftir-functional-group-search/ (accessed November 12th, 2024).
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Min Max Peak Position Group Class Peak Details
3584 3700 3584-3700 O-H stretching alcohol medium, sharp
3200 3550 3200-3550 O-H stretching alcohol strong, broad
3450 3550 3500 N-H stretching primary amine medium
3300 3400 3300-3400 N-H stretching aliphatic primary amine medium
3310 3350 3310-3350 N-H stretching secondary amine medium
2500 3300 2500-3300 O-H stretching carboxylic acid strong, broad
2700 3200 2700-3200 O-H stretching alcohol weak, broad
2800 3000 2800-3000 N-H stretching amine salt strong, broad
3267 3333 3267-3333 C-H stretching alkyne strong, sharp
3000 3100 3000-3100 C-H stretching alkene medium
2840 3000 2840-3000 C-H stretching alkane medium
2695 2830 2695-2830 C-H stretching aldehyde medium
2550 2600 2550-2600 S-H stretching thiol weak
2299 2399 2349 O=C=O stretching carbon dioxide strong
2225 2300 2250-2275 N=C=O stretching isocyanate strong, broad
2222 2260 2222-2260 C≡N stretching nitrile weak
2190 2260 2190-2260 C≡C stretching alkyne weak
2140 2175 2140-2175 S-C≡N stretching thiocyanate strong
2120 2160 2120-2160 N=N=N stretching azide strong
2100 2200 2150 C=C=O stretching ketene
2120 2145 2120-2145 N=C=N stretching carbodiimide strong
2100 2140 2100-2140 C≡C stretching alkyne weak
1990 2140 1990-2140 N=C=S stretching isothiocyanate strong
1900 2000 1900-2000 C=C=C stretching allene medium
1950 2050 2000 C=C=N stretching ketenimine
1650 2000 1650-2000 C-H bending aromatic compound weak
1768 1868 1818 C=O stretching anhydride strong
1785 1815 1785-1815 C=O stretching acid halide strong
1770 1800 1770-1800 C=O stretching conjugated acid halide strong
1725 1825 1775 C=O stretching conjugated anhydride strong
1770 1780 1770-1780 C=O stretching vinyl / phenyl ester strong
1710 1810 1760 C=O stretching carboxylic acid strong
1735 1750 1735-1750 C=O stretchin esters strong
1735 1750 1735-1750 C=O stretching δ-lactone strong
1700 1890 1745 C=O stretching cyclopentanone strong
1720 1740 1720-1740 C=O stretching aldehyde strong
1715 1730 1715-1730 C=O stretching α,β-unsaturated ester strong
1705 1725 1705-1725 C=O stretching aliphatic ketone strong
1706 1720 1706-1720 C=O stretching carboxylic acid strong
1680 1710 1680-1710 C=O stretching conjugated acid strong
1685 1710 1685-1710 C=O stretching conjugated aldehyde strong
1640 1740 1690 C=O stretching primary amide strong
1640 1690 1640-1690 C=N stretching imine / oxime strong
1666 1685 1666-1685 C=O stretching conjugated ketone strong
1630 1730 1680 C=O stretching secondary amide strong
1630 1730 1680 C=O stretching tertiary amide strong
1600 1700 1650 C=O stretching δ-lactam strong
1668 1678 1668-1678 C=C stretching alkene weak
1665 1675 1665-1675 C=C stretching alkene weak
1665 1675 1665-1675 C=C stretching alkene weak
1626 1662 1626-1662 C=C stretching alkene medium
1648 1658 1648-1658 C=C stretching alkene medium
1600 1650 1600-1650 C=C stretching conjugated alkene medium
1580 1650 1580-1650 N-H bending amine medium
1566 1650 1566-1650 C=C stretching cyclic alkene medium
1638 1648 1638-1648 C=C stretching alkene strong
1610 1620 1610-1620 C=C stretching α,β-unsaturated ketone strong
1500 1550 1500-1550 N-O stretching nitro compound strong
1435 1485 1465 C-H bending alkane medium
1400 1500 1450 C-H bending alkane medium
1380 1390 1380-1390 C-H bending aldehyde medium
1380-1385 C-H bending alkane medium
1395 1440 1395-1440 O-H bending carboxylic acid medium
1330 1420 1330-1420 O-H bending alcohol medium
1380 1415 1380-1415 S=O stretching sulfate strong
1380 1410 1380-1410 S=O stretching sulfonyl chloride strong
1000 1400 1000-1400 C-F stretching fluoro compound strong
1310 1390 1310-1390 O-H bending phenol medium
1335 1372 1335-1372 S=O stretching sulfonate strong
1335 1370 1335-1370 S=O stretching sulfonamide strong
1342 1350 1342-1350 S=O stretching sulfonic acid strong
1300 1350 1300-1350 S=O stretching sulfone strong
1266 1342 1266-1342 C-N stretching aromatic amine strong
1250 1310 1250-1310 C-O stretching aromatic ester strong
1200 1275 1200-1275 C-O stretching alkyl aryl ether strong
1020 1250 1020-1250 C-N stretching amine medium
1200 1225 1200-1225 C-O stretching vinyl ether strong
1163 1210 1163-1210 C-O stretching ester strong
1124 1205 1124-1205 C-O stretching tertiary alcohol strong
1085 1150 1085-1150 C-O stretching aliphatic ether strong
1087 1124 1087-1124 C-O stretching secondary alcohol strong
1050 1085 1050-1085 C-O stretching primary alcohol strong
1030 1070 1030-1070 S=O stretching sulfoxide strong
1040 1050 1040-1050 CO-O-CO stretching anhydride strong, broad
985 995 985-995 C=C bending alene strong
960 980 960-980 C=C bending alkene strong
885 895 885-895 C=C bending alkene strong
550 850 550-850 C-Cl stretching halo compound strong
790 840 790-840 C=C bending alkene medium
665 730 665-730 C=C bending aklene strong
515 690 515-690 C-Br stretching halo compound strong
500 600 500-600 C-I stretching halo compound strong
860 900 860-900 C-H bending 1,2,4-trisubstituted strong
860 900 860-900 C-H bending 1,3-disubstituted strong
790 830 790-830 C-H bending 1,4-disubstituted strong
790 830 790-830 C-H bending 1,2,3,4-tetrasubstituted strong
760 800 760-800 C-H bending 1,2,3-trisubstituted strong
735 775 735-775 C-H bending 1,2-disubstituted strong
730 770 730-770 C-H bending monosubstituted strong
680 720 680-720 benzene derivative



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