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.
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.
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
Section: Chapter Questions
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.
Transcribed Image Text:Structure E: C3H5N
T
Q
3
2
1
PPM
Transcribed Image Text:cabon that is attached to two carbons) in a similar environment. Similarly, the chemical
focpency than the chemical shift of methylene protons (hydrogens attached to an sp
The Characteristic Values of Chemi
Table 14.1
Approximate Values of Chemical Shifts for 'H NMR
ne
ro
ed
the
Approximate
chemical shift
Approximate
chemical shift
Type of proton
(ppm)
and
Type of proton
(ppm)
m).
-CH3
0.85
2.5-4
-CH2-
1.20
Br-C-H
2.5-4
to the
-CH-
1.55
on the
Cl-C
H-
3-4
ne pro-
for the
C-CH3
1.7
F-
4-4.5
occurs
o iodine
-C-CH3
2.1
R-NH
Variable, 1.5-4
R-OH
Variable, 2-5
CH3
2.3
3.20 ppm
OH
Variable, 4-7
-C=C-H
2.4
H
6.5-8
R-0-CH3
3.3
9.0-10
R-C=CH2
4.7
OH
Variable, 10-12
R-C=C-H
5.3
R R
Variable, 5-8
-NH,
The values are
me
-0
MR spectrum
the kinds
nol-
met
t of meth
hon is the chemical shift of methyl
hon) in a similar
shown in Table
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