Problem 227
IR Spectrum
(liquid film)
1726
4000
3000
2000
V (cm⁻¹)
1600
1200
800
Mass Spectrum
100
41
80
% of base peak
60
69
40
M⁺⁺
100
20
C₅H₈O₂
40
80
120
160
200
240
280
m/e
¹³C NMR Spectrum
(100.0 MHz, CDCl₃ solution)
DEPT CH₃↑ CH₂↓ CH↑
proton decoupled
solvent
200
160
120
80
40
0
δ (ppm)
¹H NMR Spectrum
(400 MHz, CDCl₃ solution)
expansions
expansion
expansion
6.12
6.08 ppm
5.58
5.54 ppm
3.76 3.74 ppm
1.96
1.92 ppm
Expansion Scale
0
10
20 Hz
TMS
10
9
8
7
6
5
4
3
2
1
0
δ (ppm)