In your TABLE, if you feel it is difficult to choose between two NMR peaks for any hydrogens, you can list the two ppm values of those peaks (e.g., H1 = X ppm or Y ppm). Keep in mind that peaks might overlap (e.g., H8 & H9, although not equivalent, appear as a single peak due to their remoteness from asymmetric centers). j Hg | | | H1 H2 H3 H7 H5 H3 H4.. list ppm values below H2... H6 H1 H6 H1 ‒‒‒ H2 H4 H3 H7 H5 O H9 H8

Organic Chemistry: A Guided Inquiry
2nd Edition
ISBN:9780618974122
Author:Andrei Straumanis
Publisher:Andrei Straumanis
ChapterL3: Carbon (13c) Nmr Spectroscopy
Section: Chapter Questions
Problem 19CTQ
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Examine the 1H NMR spectrum of sesamin attached

a. In the TABLE directly below the structure of sesamin shown here, assign 1H NMR peak ppm values to the equivalent sets of NON-AROMATIC hydrogens

In your TABLE, if you feel it is difficult to choose between two NMR peaks for any hydrogens, you can list the
two ppm values of those peaks (e.g., H1 = X ppm or Y ppm).
Keep in mind that peaks might overlap (e.g., H8 & H9, although not equivalent, appear as a single peak due to
their remoteness from asymmetric centers).
H8
f
Hg"
H1
H2
H3
H4
H8/H9
H7
H5
H3
H4...
list ppm values below
H2.
H6
H1
O
H6
H1
H2
H4
H3
H7
H5
t
H8
H9
Transcribed Image Text:In your TABLE, if you feel it is difficult to choose between two NMR peaks for any hydrogens, you can list the two ppm values of those peaks (e.g., H1 = X ppm or Y ppm). Keep in mind that peaks might overlap (e.g., H8 & H9, although not equivalent, appear as a single peak due to their remoteness from asymmetric centers). H8 f Hg" H1 H2 H3 H4 H8/H9 H7 H5 H3 H4... list ppm values below H2. H6 H1 O H6 H1 H2 H4 H3 H7 H5 t H8 H9
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