Post on 15-Sep-2015
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: