Unknown Spectroscopy Practice Problems: Problem #9 What hydrocarbon (hydrogen and carbon only) formula would you use to start this problem? How many degrees of unsaturation does it have? How would you revise your molecular formula and degrees of unsaturation based on the IR spectrum? What are possible source(s) of that amount of degrees of unsaturation?

Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Problem 9
IR Spectrum
(liquid film)
1738
2000
1600
V (cm')
4000
3000
1200
800
100
Mass Spectrum
80
M+ = 84
60
No significant UV
absorption above 220 nm
40
20
40
80
120
160
200
240
280
m/e
13C NMR Spectrum
(100.0 MHz, CDCI, solution)
proton decoupled
solvent
200
160
120
80
40
O 8 (ppm)
H NMR Spectrum
expansion
(400 MHz, CDCI, solution)
2.2
1.8 PPM
TMS
10
9
8
7
6.
4
3
2
1
8 (ppm)
% of base peak
Transcribed Image Text:Problem 9 IR Spectrum (liquid film) 1738 2000 1600 V (cm') 4000 3000 1200 800 100 Mass Spectrum 80 M+ = 84 60 No significant UV absorption above 220 nm 40 20 40 80 120 160 200 240 280 m/e 13C NMR Spectrum (100.0 MHz, CDCI, solution) proton decoupled solvent 200 160 120 80 40 O 8 (ppm) H NMR Spectrum expansion (400 MHz, CDCI, solution) 2.2 1.8 PPM TMS 10 9 8 7 6. 4 3 2 1 8 (ppm) % of base peak
Unknown Spectroscopy Practice Problems: Problem #9
What hydrocarbon (hydrogen and carbon only) formula would you use to start this
problem? How many degrees of unsaturation does it have?
How would you revise your molecular formula and degrees of unsaturation based on the
IR spectrum? What are possible source(s) of that amount of degrees of unsaturation?
Transcribed Image Text:Unknown Spectroscopy Practice Problems: Problem #9 What hydrocarbon (hydrogen and carbon only) formula would you use to start this problem? How many degrees of unsaturation does it have? How would you revise your molecular formula and degrees of unsaturation based on the IR spectrum? What are possible source(s) of that amount of degrees of unsaturation?
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