Solution Spectroscopy Challenge 2

Pretsch, Ern�; Zenobi, Renato
September 2003
Analytical & Bioanalytical Chemistry;Sep2003, Vol. 377 Issue 2, p232
Academic Journal
This article presents solution to the quiz spectroscopy challenge 2, published in the September 15, 2003 issue of the journal "Analytical and Bioanalytical Chemistry." The total number of H bonded to C is 6 as compared to 10 found in the 1H nuclear magnetic resonance spectrum. The contradiction is resolved by assuming the presence of a monosubstituted benzene ring and of two OH protons. The HMBC spectrum provides direct evidence for the assignment of the aromatic C atoms in ortho position relative to the substituent and, thus, also for the other C atoms.


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