Thursday
September 18, 2014

Homework Help: organic chemistry II lab NMR

Posted by Jay on Friday, October 12, 2012 at 9:19pm.

Why do we only see four peaks in the 1H NMR when we have five CH2 groups and 2 OH groups?
Answer
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.

HNMR
triplet at 2.3 ppm, quintet at 1.55, quintet at 1.25
the hydoxyl hydrogens are not shown in the link below but would be an intense singlet at 9.4 ppm.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

NMR Organic Chemistry multiple choice - Why do we only see four peaks in the 1H ...
chemistry - please explain why the gem-dimethyl groups appear as separate peaks ...
Science - I have my carbon NMR spectra and my product should not have any N in ...
Organic Chemistry - How many peaks would be expected in the 1H NMR spectrum for ...
organic chem - looking at this h nmr spectra of 4 isomeric alcohols with the ...
Cyclohexane - If you knew that you had either cyclohexane or cyclohexene in the ...
s103 - Reaction 1 O ll CH2=CH-CH-OH + CH3-CH-CH2-C l l l CH3 CH3 OH compound 1 ...
Chemistry - Hey; I am doing a lab write up that has to do with NMR spectroscopy...
Ochem - Identify the following compound from its IR and proton NMR spectra. ...
Organic Chemistry - What advantages does H NMR have over melting point in the ...

Search
Members