0827 Chapter 2 IR Spectra

0827 Chapter 2 IR Spectra - FIGURE 2.11 The IR spectrum of...

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Unformatted text preview: FIGURE 2.11 The IR spectrum of octane. (Notice that, in IR spectra, the peaks are usually measured in % transmittance. Thus, the peak at 2900 cm ‘ has 10% transmittance, that is, an absorbance, A, of 0.90.) Cl‘lzi M (C—H bending) i -CHZ— (C—H bending) 7 6 ’3 3\ v 0) U C m a ‘1 E W C ‘3 )— CH3 i. —CH2— lC—H stretching» (C-v-H stretching) 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650 Wavenumber (cm 1) FIGURE 2.12 The IR spectrum of methylbenzene (toluene). LO Q Combination bands muoo COO Aromatic (72C (stretch) [— bLfi OO 52 Q) u c S E m c: (O h- .— (a) 0 HM OO ((T—H bending) monosubstututed ‘ benzene 0 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650 Wavenumber (cm‘l) FIGURE 2.13 The IR spectrum of 1-heptyne. C:C (stretch) ’3 3: OJ U C m H t.‘ E m C S 1.. (stretch) 1 ;J_ CH2, CH3 (stretch) 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650 Wavenumber (cm 1) FIGURE 2.14 The IR spectrum of 1-octene. (stretch) U‘O‘ CH2 bend —Cl-I=CH.3 (out-of- plane bendings) ’6 o\ G) U C N H ":.‘ E W C {‘3 ’— 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650 Wavenumber (cm 1) FIGURE 2.17 The IR spectrum of propanoic acid. \Jk ‘q 03 «0 OOO ‘ 04H ' ‘ (out-of-plane ' y ‘ bend) ’. I (‘.-()-H 1" O ' k (m plane bend). 50103 000 o 3‘ V O) U C (U Q—‘ .‘2 m C ‘2 p. 0.) O (7-()(stretch) ll ‘ | "L ' 11 (stretch) .'. O-‘N OO O 4000 3600 3200 2800 2400 2000 1800 1600 1400 1200 1000 800 650 Wavenumber (cm'l) ...
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This note was uploaded on 09/10/2008 for the course CHEM 322AL taught by Professor Jung during the Fall '07 term at USC.

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