Wield the ¹3C NMR as your second-greatest weapon. How many unique signals do you see? What does this mean for symmetry? 13C NMR (100 MHz, CDC13) a = 191.9, 156.2, 134.6, 130.0, 127.1, 34.5, 23.6.

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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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Wield the 13C NMR as your second-greatest weapon. How many unique
signals do you see? What does this mean for symmetry?
1³C NMR (100 MHz, CDC13) a = 191.9, 156.2, 134.6, 130.0, 127.1, 34.5,
23.6.
200
180
Source: AIST
CDS-00-276
12
11
Source: AIST
HSP-01-943
160
10
9
140
8
120
CHC13
7
100
ppm
Wielding the ¹H NMR as your greatest weapon, identify functional groups
and start drawing structures.
¹H NMR (CDCl3, 90 MHz) a = 9.96 (s, 1H); 7.80 (d, J = 8.4 Hz, 2H),
7.38 (d, J = 8.4 Hz, 2H), 2.97 (septet, J = 9.4 Hz, 1H), 1.28 (d, J = 9.4 Hz,
6H).
6
5
CDCl3
80
ppm
4
60
3
40
2
20
1
O
O
Transcribed Image Text:Wield the 13C NMR as your second-greatest weapon. How many unique signals do you see? What does this mean for symmetry? 1³C NMR (100 MHz, CDC13) a = 191.9, 156.2, 134.6, 130.0, 127.1, 34.5, 23.6. 200 180 Source: AIST CDS-00-276 12 11 Source: AIST HSP-01-943 160 10 9 140 8 120 CHC13 7 100 ppm Wielding the ¹H NMR as your greatest weapon, identify functional groups and start drawing structures. ¹H NMR (CDCl3, 90 MHz) a = 9.96 (s, 1H); 7.80 (d, J = 8.4 Hz, 2H), 7.38 (d, J = 8.4 Hz, 2H), 2.97 (septet, J = 9.4 Hz, 1H), 1.28 (d, J = 9.4 Hz, 6H). 6 5 CDCl3 80 ppm 4 60 3 40 2 20 1 O O
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