Answered: The IR and 1H NMR spectra of an…

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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The IR and 1H NMR spectra of an unknown, whose molecular formula is C11H14O3, are shown below. The following questions will guide you in determining the structure.
a- Determine the degree of unsaturation of the unknown. Show your calculation.
b- Identify three significant bands in the IR spectrum that will help to conclude on the functions that exist in this molecule.

2.5 2.6 2.7 2.8 2.9 3
100
90
80
70
60
50
40
30
20
10
0
4000
LTRANSMITTANCE
3800 3600 3400
3.5
4
4.5
3200 3000 2800 2600 2400 2200
5
2000
5.5
1800
MICRONS
6
1600
WAVENUMBERS
7
1400
8
1200
9
10
1000
11
12
800
13
14
15
16
NICOLET 20SX FT-IR
21 22
17 18 19
-0.0
.05
0.1
-0.2
0.3
0.4
+0.5
0.6
0.7
0.8
-0.9
1.0
-2.0
600
ABSORBANCE
450

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