Use the HNMR spectra shown here to determine the structural formula for the unknown cited below. Begin by calculating the degree of unsaturation for the compound. This will help you determine the total number of pi bonds plus rings that are possible for the structure. The table of chemical shift values are provided. Approximate Values of Chemical Shifts for 'H NMRThe Characteristic Values of Chemical ShifTable 14.1Approximatechemical shiftType of protonApproximatechemical shift(ppm)(ppm)Type of proton-CH30.85I-C-H2.5-4-CH-1.20Br-C-H2.5-4-CH-1.55Cl-C-H3-4-C=C-CH31.7F-C-H4-4.5e-C-CH32.1R-NH2Variable, 1.5-4R-OHVariable, 2-5CH32.3omOHVariable, 4-7-C=C-H2.4-H-6.5-8R-0-CH33.3-H-9.0-10R-C=CH2Lon4.7Variable, 10-12R.C-OHR-C=C-H5.3Variable, 5-8R RC-NHCH-methine-CH-methylenin Table-CHmethylspectrumProtonsthe kindsltached to one carbon) in a similarfour l Structure D Chemical Formula: C,H3O2TMS121042PPM

NMR spectroscopy can be used for determining the structure of a molecule. The chemical shift values…

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Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Use the HNMR spectra shown here to determine the structural formula for the unknown cited below. Begin by calculating the degree of unsaturation for the compound. This will help you determine the total number of pi bonds plus rings that are possible for the structure. The table of chemical shift values are provided.

Approximate Values of Chemical Shifts for 'H NMR
The Characteristic Values of Chemical Shif
Table 14.1
Approximate
chemical shift
Type of proton
Approximate
chemical shift
(ppm)
(ppm)
Type of proton
-CH3
0.85
I-C-H
2.5-4
-CH-
1.20
Br-C-H
2.5-4
-CH-
1.55
Cl-C-H
3-4
-C=C-CH3
1.7
F-C-H
4-4.5
e
-C-CH3
2.1
R-NH2
Variable, 1.5-4
R-OH
Variable, 2-5
CH3
2.3
om
OH
Variable, 4-7
-C=C-H
2.4
-H-
6.5-8
R-0-CH3
3.3
-H-
9.0-10
R-C=CH2
Lon
4.7
Variable, 10-12
R.
C-OH
R-C=C-H
5.3
Variable, 5-8
R R
C-NH
CH-
methine
-CH-
methylen
in Table
-CH
methyl
spectrum
Protons
the kinds
ltached to one carbon) in a similar
four l

Structure D Chemical Formula: C,H3O2
T
M
S
12
10
4
2
PPM

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