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irchart - 1680–1640(m –C=C– stretch alkenes...

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Table of Characteristic IR Absorptions m=medium, w=weak, s=strong, n=narrow, b=broad, sh=sharp frequency, cm –1 bond functional group 3640–3610 (s, sh) O–H stretch, free hydroxyl alcohols, phenols 3500–3200 (s,b) O–H stretch, H–bonded alcohols, phenols 3400–3250 (m) N–H stretch 1˚, 2˚ amines, amides 3300–2500 (m) O–H stretch carboxylic acids 3330–3270 (n, s) –C C–H: C–H stretch alkynes (terminal) 3100–3000 (s) C–H stretch aromatics 3100–3000 (m) =C–H stretch alkenes 3000–2850 (m) C–H stretch alkanes 2830–2695 (m) H–C=O: C–H stretch aldehydes 2260–2210 (v) C N stretch nitriles 2260–2100 (w) –C C– stretch alkynes 1760–1665 (s) C=O stretch carbonyls (general) 1760–1690 (s) C=O stretch carboxylic acids 1750–1735 (s) C=O stretch esters, saturated aliphatic 1740–1720 (s) C=O stretch aldehydes, saturated aliphatic 1730–1715 (s) C=O stretch α , β –unsaturated esters 1715 (s) C=O stretch ketones, saturated aliphatic 1710–1665 (s) C=O stretch α , β –unsaturated aldehydes, ketones
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Unformatted text preview: 1680–1640 (m) –C=C– stretch alkenes 1650–1580 (m) N–H bend 1˚ amines 1600–1585 (m) C–C stretch (in–ring) aromatics 1550–1475 (s) N–O asymmetric stretch nitro compounds 1500–1400 (m) C–C stretch (in–ring) aromatics 1470–1450 (m) C–H bend alkanes 1370–1350 (m) C–H rock alkanes 1360–1290 (m) N–O symmetric stretch nitro compounds 1335–1250 (s) C–N stretch aromatic amines 1320–1000 (s) C–O stretch alcohols, carboxylic acids, esters, ethers 1300–1150 (m) C–H wag (–CH 2 X) alkyl halides 1250–1020 (m) C–N stretch aliphatic amines 1000–650 (s) =C–H bend alkenes 950–910 (m) O–H bend carboxylic acids 910–665 (s, b) N–H wag 1˚, 2˚ amines 900–675 (s) C–H “oop” aromatics 850–550 (m) C–Cl stretch alkyl halides 725–720 (m) C–H rock alkanes 700–610 (b, s) –C ≡ C–H: C–H bend alkynes 690–515 (m) C–Br stretch alkyl halides...
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