C-NMR analysis of Benzil.

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Chapter19: Nuclear Magnetic Resonance Spectroscopy
Section: Chapter Questions
Problem 19.20QAP
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Help needed with the following C-NMR analysis of Benzil.

Thank you in advance

200
190 180 170 160 150 140 130 120 110
T
T
140
138 137 136
139
135
100 90
f1 (ppm)
134
111
80
133
f1 (ppm)
(ppm)
76.48
77.12
77.76
129.05
129.88
132.94
134.96
194.63
70
T
132
60
131
50
40
30 20
128
T
130
129
Assignment
10
127
0
T
126
8E+05
-7E+05
-6E+05
5E+05
4E+05
3E+05
2E+05
1E+05
-0
125
8E+05
7E+05
6E+05
5E+05
4E+05
3E+05
2E+05
1E+05
-0
Transcribed Image Text:200 190 180 170 160 150 140 130 120 110 T T 140 138 137 136 139 135 100 90 f1 (ppm) 134 111 80 133 f1 (ppm) (ppm) 76.48 77.12 77.76 129.05 129.88 132.94 134.96 194.63 70 T 132 60 131 50 40 30 20 128 T 130 129 Assignment 10 127 0 T 126 8E+05 -7E+05 -6E+05 5E+05 4E+05 3E+05 2E+05 1E+05 -0 125 8E+05 7E+05 6E+05 5E+05 4E+05 3E+05 2E+05 1E+05 -0
2.
3
NMR nuclei observed: C13
Solvent: CDC13
NMR field strength: 400 MHz
1
4
6
5
10
8
11
14
12
13
Transcribed Image Text:2. 3 NMR nuclei observed: C13 Solvent: CDC13 NMR field strength: 400 MHz 1 4 6 5 10 8 11 14 12 13
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