IR bands - 1,3(meta sub 990-860 810-750 725-680(m-s(s...

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Alkanes C–H 2980-2850 (m-s), C–C 1480-1420 (m-w) Alkenes =C–H 3150-3000 (m), C=C 1680-1620 (m-w), conj C=C 1630-1600 (m-w) R 2 C=CH 2 895-885, 915-905 (s) RHC=CH 2 995-985, 915-905 (s) R 2 C=CHR 840-790 (m) trans HC=CH 980-960 (s), cis HC=CH 730-665 (s) Alkynes C–H 3350-3300 (s), C C 2260-2100 (w, sometimes absent in symmetrical alkynes) Alcohols OH (free) 3650-3580 (m) OH (hydrogen bonded 3550-3300, broad) C–O 1260-1000, 1150-1050 (s) Amines NH 3530-3100 (br, m) C–N ~1200 (m) Aromatics =CH 3080-3020 (m-w), C=C 1600-1580 (m-w) monosubstituted 770-730, 710-690 (s) 1,2 (ortho) sub. 770-735 (s)
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Unformatted text preview: 1,3 (meta) sub. 990-860, 810-750, 725-680 (m-s) (s) 1,4 (para) sub. 860-800 (s) Carbonyls, C=O ketones (R 2 C=O) 1730-1700 (s, higher if strained), 1680-1660 if conjugated (C=C–C=O) aldehydes (RHC=O) C=O 1730-1700 (s), H–C=O 2900-2700 (m-w, two bands present) esters 1750-1735 (s, C=O), 1300-1000 (s, C-O) R C O OR carboxylic acids 1730-1700 (s, C=O), 3200-2800 (s, broad, OH) R C O OH acid chlorides 1820-1770 (s, C=O) R C O Cl R C O O O R anhydrides 1820-1750 (s, C=O, two bands), 1150-1000 s, C–O) RC N cyanides (nitriles) ~2250 (s) R 2 C NH imines 1680-1640 (m) Typical Infrared absorptions in cm –1 s = strong, m = medium, w = weak...
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This note was uploaded on 03/02/2010 for the course CHEMISTRY orgo taught by Professor Jones during the Spring '10 term at NYU.

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