a. % Transmittance 100 80 60 40 20 0 For the IR spectrum shown below, identify the structural features which cause each of the major IR signals. (You will have to decide which of the signals are considered important enough to be considered to be "major" - essentially you should look at the higher energy region je. above than the fingerprint region.) 4000 3500 3000 2500 2000 Wavenumber (cm³¹) 1500 1000

Chemistry
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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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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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This question deals with ethyl 4-aminobenzoate.

a.
% Transmittance
100
80
60
40
20
0
For the IR spectrum shown below, identify the structural features which cause each of the
major IR signals. (You will have to decide which of the signals are considered important
enough to be considered to be "major" - essentially you should look at the higher energy
region je. above than the fingerprint region.)
4000
3500
3000
2500
2000
Wavenumber (cm³¹)
1500
1000
Transcribed Image Text:a. % Transmittance 100 80 60 40 20 0 For the IR spectrum shown below, identify the structural features which cause each of the major IR signals. (You will have to decide which of the signals are considered important enough to be considered to be "major" - essentially you should look at the higher energy region je. above than the fingerprint region.) 4000 3500 3000 2500 2000 Wavenumber (cm³¹) 1500 1000
b.
For the NMR spectrum shown below, draw the structure of the compound next to the
spectrum and label the protons so that they match the letter labels shown on the NMR
spectrum. Fill in the Chemical shift, integration and multiplicity in the table. You should
consider electron donating and withdrawing effects before assigning the aromatic ring
protons.
We ha
10 ppm
A
1e1-
STRUCTURE:
-1.889
Proton
label
B
A
B
с
D
E
5 ppm
C and D
Note that the actual measured integration values are given above each set of peaks.
Also note that the signal from -3.8-4.5 ppm is due to two overlapping signals;
A quartet (C) and a very broad singlet (D).
Each of these two signas has an integration of approximately 2.0
(the total integration for this combined signal is approximately 4.0 (actual = 3.851))
Chemical shift Relative
(ppm)
E
0 ppm
Expected (& observed)
integration Multiplicity
Transcribed Image Text:b. For the NMR spectrum shown below, draw the structure of the compound next to the spectrum and label the protons so that they match the letter labels shown on the NMR spectrum. Fill in the Chemical shift, integration and multiplicity in the table. You should consider electron donating and withdrawing effects before assigning the aromatic ring protons. We ha 10 ppm A 1e1- STRUCTURE: -1.889 Proton label B A B с D E 5 ppm C and D Note that the actual measured integration values are given above each set of peaks. Also note that the signal from -3.8-4.5 ppm is due to two overlapping signals; A quartet (C) and a very broad singlet (D). Each of these two signas has an integration of approximately 2.0 (the total integration for this combined signal is approximately 4.0 (actual = 3.851)) Chemical shift Relative (ppm) E 0 ppm Expected (& observed) integration Multiplicity
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