Proton NMR, Sample #10


Analysis: C8H9Br
Help with Analysis
1H NMR
NMR Spectrum

Correlation Table Common Splitting Interpret NMR
Give Structure Return to NMR Home


C8H9Br

From the molecular formula, the compound has "4 degrees of unsaturation" (four double bonds or rings), suggesting the presence of an aromatic compound (benzene has four degrees of unsaturation).

Return to Top



The proton NMR has three sets of peaks; a singlet at 4.3 (2H), a messy singlet around 7.1 (4H), and a singlet at 2.3 (3H). The singlet at 2.3 is consistent with an isolated CH3 adjacent to a mildly electronegative center. The singlet at 4.3 is consistent with a CH2 group adjacent to two mildly electronegative centers (X-CH2-Y), and the singlet at 7.1 is consistent with a disubstituted aromatic compound. The substitution pattern is not what is normally seen in 1,4-disubstitution (two doublets), suggesting 1,2 or 1,3-disubstitution.

Click here for a review on proton NMR.

Click here to view a 1H NMR correlation table.

Return to NMR Spectrum



Structure: structure

IUPAC Name: 3-bromomethyltoluene (3-bromomethyl-1-methylbenzene)

Return to Top


Copyright 1996, Paul R. Young, University of Illinois at Chicago, All Rights Reserved