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  • IR Spectroscopy Tutorial: Aromatics - orgchemboulder. com
    The =C–H stretch in aromatics is observed at 3100-3000 cm-1 Note that this is at slightly higher frequency than is the – C–H stretch in alkanes This is a very useful tool for interpreting IR spectra: Only alkenes and aromatics show a C–H stretch slightly higher than 3000 cm -1
  • 11. 5: Infrared Spectra of Some Common Functional Groups
    In aromatic compounds, each band in the spectrum can be assigned: C–H stretch from 3100-3000 cm-1; overtones, weak, from 2000-1665 cm-1; C–C stretch (in-ring) from 1600-1585 cm-1; C–C stretch (in-ring) from 1500-1400 cm-1; C–H "oop" from 900-675 cm-1; Note that this is at slightly higher frequency than is the –C–H stretch in alkanes
  • 15. 7 Spectroscopy of Aromatic Compounds - OpenStax
    As we saw in the brief introduction to infrared spectroscopy (Section 12 8), aromatic rings show a characteristic C–H stretching absorption at 3030 cm –1 and a series of peaks in the 1450 to 1600 cm –1 range of the infrared spectrum
  • 15. 7 Spectroscopy of Aromatic Compounds – Organic Chemistry: A Tenth . . .
    As we saw in the brief introduction to infrared spectroscopy (Section 12 8), aromatic rings show a characteristic C–H stretching absorption at 3030 cm–1 and a series of peaks in the 1450 to 1600 cm–1 range of the infrared spectrum
  • Aromatic CH Stretching Frequencies - Big Chemical Encyclopedia
    The aromatic CH stretch is usually a band of medium to weak intensity For some aromatic compounds several bands can be found near 3030 cm When a sodium chloride monochromator is used, the aromatic CH stretch may not be resolved from the stronger alkane CH vibrations
  • Chemistry: Infrared spectra of aromatic rings - Blogger
    Aromatic C=C stretches are often in pairs, with one at 1600 and one at 1475 Like substituted alkenes, there are out-of-plane C-H bends between 900 and 690 These result in an overtone combination band between 2000 and 1667, which is often used to assign how the aromatic molecule is substituted
  • Infrared identification of organic unknowns - 800mainstreet. com
    The aromatic CH stretch appears at 3100-3000 cm-1 There are aromatic CC stretch bands (for the carbon-carbon bonds in the aromatic ring) at about 1500 cm-1 Two bands are caused by bending motions involving carbon-hydrogen bonds
  • Infrared Spectroscopy - University of Missouri
    Both spectra show the strong C-H stretch for alkane-type hydrogens, since the absorptions occurs < 3000 cm-1 Vinyl C-H stretches show up at slightly higher frequencies, above 3000 cm-1, and this is a very good way to tell vinylic or aromatic C-H’s are present 2 Table 1 Characteristic Group Frequencies
  • 6. 3 IR Spectrum and Characteristic Absorption Bands
    The spikes are called absorption bands in the IR spectrum A molecule has a variety of covalent bonds, and each bond has different vibration modes, so the IR spectrum of a compound usually shows multiple absorption bands
  • IR Peaks Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like Alkyl CH stretch, Vinyl aromatic CH stretch (CH stretch on a C double bond C), Alkynyl CH stretch (CH stretch attached to C triple bond C) and more





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