February 20, 2017

Homework Help: NMR Organic Chemistry multiple choice

Posted by Jay on Friday, October 12, 2012 at 9:23pm.

Why do we only see four peaks in the 1H NMR when we have five CH2 groups and 2 OH groups?
a. There should be more peaks, but they peaks are overlapping in the spectrum.
b. Heptanedioic acid is a symmetrical molecule.
c. Heptanedioic acid is a chiral molecule.
d. Heptanedioic acid is an unsymmetrical molecule.

molecule is heptanedioic acid also known as pimelic acid.

triplet at 2.3 ppm, quintet at 1.55, quintet at 1.25
the hydoxyl hydrogens would be an intense singlet at 9.4 ppm.

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