The Mass spec of the compound has a molecular ion peak at m/z = 178 and a base peak at m/z = 178 (yes, the same value). The proton NMR showed the following: Signal Shift (ppm) Integration 8.4 A B C 0.8 There are four C-13 signals: 125, 126, 128, and 132 ppm. A simple C13 chart is provided at the The integrations for the four C13 peaks are 2:2:1:2 respectively. The IR Spectrum is presented below (black vertical line at 3000 cm³¹ was drawn in): INFRARED SPECTRUM 0.6 0.4 8.0 7.4 Splitting Singlet 1 Doublet 2 Doublet of Doublets 2 C. e. 2000 Wavenumber (cm-1) Other information available: The molecule does not react with bromine in chloroform but can be brominated using bromine and FeBr3, and three different monobromo products are obtained. a. The number of H's in the compound have to be a multiple of what integer? Explain your answer. b. The number of C's in the compound have to be a multiple of what integer? is the maximum number of C's that can be in the compound? determined the maximum number of C's in the compound 1000 What What functional groups are present in the compound (alkyl, aryl, ketone, etc.)? Explain your answer by referring to the information provided above. d. Given your answers to a-c above write a molecular formula consistent with all the data Explain how you presented. Draw a structure for the unknown compound that is consistent with the data above

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter14: Mass Spectrometry
Section: Chapter Questions
Problem 14.37P
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The Mass spec of the compound has a molecular ion peak at m/z = 178 and a base peak at m/z =
178 (yes, the same value). The proton NMR showed the following:
Signal Shift (ppm)
Integration
8.4
8.0
7.4
A
B
C
There are four C-13 signals: 125, 126, 128, and 132 ppm. A simple C13 chart is provided at the
The integrations for the four C13 peaks are 2:2:1:2 respectively.
The IR Spectrum is presented below (black vertical line at 3000 cm³¹ was drawn in):
INFRARED SPECTRUM
0.8
0.6
0.4
Splitting
Singlet
1
Doublet
2
Doublet of Doublets 2
C.
2000
Wavenumber (cm-1)
Other information available:
The molecule does not react with bromine in chloroform but can be brominated using bromine
and FeBr3, and three different monobromo products are obtained.
a. The number of H's in the compound have to be a multiple of what integer?
Explain your answer.
b. The number of C's in the compound have to be a multiple of what integer?
is the maximum number of C's that can be in the compound?
determined the maximum number of C's in the compound
e.
1000
What
What functional groups are present in the compound (alkyl, aryl, ketone, etc.)?
Explain your answer by referring to the information provided above.
d. Given your answers to a-c above write a molecular formula consistent with all the data
Explain how you
presented.
Draw a structure for the unknown compound that is consistent with the data above
Transcribed Image Text:The Mass spec of the compound has a molecular ion peak at m/z = 178 and a base peak at m/z = 178 (yes, the same value). The proton NMR showed the following: Signal Shift (ppm) Integration 8.4 8.0 7.4 A B C There are four C-13 signals: 125, 126, 128, and 132 ppm. A simple C13 chart is provided at the The integrations for the four C13 peaks are 2:2:1:2 respectively. The IR Spectrum is presented below (black vertical line at 3000 cm³¹ was drawn in): INFRARED SPECTRUM 0.8 0.6 0.4 Splitting Singlet 1 Doublet 2 Doublet of Doublets 2 C. 2000 Wavenumber (cm-1) Other information available: The molecule does not react with bromine in chloroform but can be brominated using bromine and FeBr3, and three different monobromo products are obtained. a. The number of H's in the compound have to be a multiple of what integer? Explain your answer. b. The number of C's in the compound have to be a multiple of what integer? is the maximum number of C's that can be in the compound? determined the maximum number of C's in the compound e. 1000 What What functional groups are present in the compound (alkyl, aryl, ketone, etc.)? Explain your answer by referring to the information provided above. d. Given your answers to a-c above write a molecular formula consistent with all the data Explain how you presented. Draw a structure for the unknown compound that is consistent with the data above
215
220
R = sp³ C or H
C represents carbon of interest
A-C-A
200
Carbonyl:
Aldehyde
Ketone
200
180.0
165.0
Carbonyl:
Ester
Amide
Carboxylic Acid
180
160
13C NMR Chemical Shift Table
140.0
130
140
R-CEN
125.0
Nitriles
X
Alkenes
120.0
Substituted
Benzenes
120
110
ppm
RR
Alkyl fluorides
100
80.0
R
80
R-CER
Alkynes
CDC13
Alkyl bromides
R
R-C-N-R
Amines
60.0
Alcohols
Ethers
AR
R-CR
CI
60
Alkyl chlorides
Alkanes
40
30
40
20
1
0
Transcribed Image Text:215 220 R = sp³ C or H C represents carbon of interest A-C-A 200 Carbonyl: Aldehyde Ketone 200 180.0 165.0 Carbonyl: Ester Amide Carboxylic Acid 180 160 13C NMR Chemical Shift Table 140.0 130 140 R-CEN 125.0 Nitriles X Alkenes 120.0 Substituted Benzenes 120 110 ppm RR Alkyl fluorides 100 80.0 R 80 R-CER Alkynes CDC13 Alkyl bromides R R-C-N-R Amines 60.0 Alcohols Ethers AR R-CR CI 60 Alkyl chlorides Alkanes 40 30 40 20 1 0
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