Example 17.pdf

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Transcript of Example 17.pdf

  • 1434359831537.201 Example17

    http://orgchem.colorado.edu/Spectroscopy/specttutor/ex17.html 1/2

    SpectroscopyTutorial:Examples

    Example17

    C7H8O

    MW108

    Calculatethedegreeofunsaturation:theansweris4.Themoleculeprobablyhasanaromaticring.

    IRSpectrum

    ThemostprominentbandistheOHstretchat3335.Alsolookforaromaticbandsfrom16001585and15001400:theyarepresent.

    NMRSpectrum

  • 1434359831661.201 Example17

    http://orgchem.colorado.edu/Spectroscopy/specttutor/ex17.html 2/2

    The4protonsfrom6.67.2ppmindicateanorthoormetadisubstitutedaromaticring.Thephenolproton,OH,showsupanywherefrom412ppmthesingletat5.2ppmindicatesthisproton.Sincetheringisdisubstituted,thesingletat2.3ppmof3hydrogensmustindicateamethylgrouponthering.

    Summary

    Example15is3methylphenol: