Question

IR Spectrum (liquid film) 4000 3000 2000 1600 1200 800 V (cm$^{-1}$) 100 80 60 40 20 % of base peak 1735 1717 43 57 Mass Spectrum MS/MS: 158 $ ightarrow$ 85, 57, 43 85 No significant UV absorption above 220 nm M$^{+cdot}$ 158 < 1% C$_8$H$_{14}$O$_3$ 40 80 120 160 200 240 280 m/e

          IR Spectrum
(liquid film)
4000
3000
2000
1600
1200
800
V (cm$^{-1}$)
100
80
60
40
20
% of base peak
1735
1717
43
57
Mass Spectrum
MS/MS: 158 $
ightarrow$ 85, 57, 43
85
No significant UV
absorption above 220 nm
M$^{+cdot}$ 158 < 1%
C$_8$H$_{14}$O$_3$
40
80
120
160
200
240
280
m/e

IR Spectrum
(liquid film)
4000
3000
2000
1600
1200
800
V (cm^-1)
100
80
60
40
20
% of base peak
1735
1717
43
57
Mass Spectrum
MS/MS: 158 ightarrow 85, 57, 43
85
No significant UV
absorption above 220 nm
M^+cdot 158 < 1%
C8H14O3
40
80
120
160
200
240
280
m/e

Added by Samantha A.

Chemistry: Structure and Properties

Nivaldo Tro 2nd Edition

Instant Answer

Solved by Expert Adi S

09/09/2022

Step 1

The peaks at 1735 cm^-1 and 1717 cm^-1 suggest the presence of carbonyl groups (C=O). The absence of significant peaks in the 3000-3500 cm^-1 range suggests the absence of O-H (hydroxyl) groups, indicating that the carbonyl groups are likely part of esters or Show more…

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IR Spectrum (liquid film) 1735 1717 4000 3000 2000 1600 1200 800 v (cm-1) Mass Spectrum % of base peak 43 57 85 MS/MS: 158 -> 85, 57, 43 No significant UV absorption above 220 nm M+* 158 < 1% C8H14O3 40 80 120 160 200 240 280 m/e