Organic Chemistry
4th Edition
ISBN: 9780073402772
Author: Janice G. Smith
Publisher: MCG
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Textbook Question
Chapter 13, Problem 13.45P
A chiral hydrocarbon X exhibits a molecular ion at
shows peaks at
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This question has multiple parts. Work all the parts to get the most points.
a Give the structure for the compound with the empirical formula C3H3O2 and the following spectral data:
1Η ΝMR
Singlet at 3.7 ppm (3H); multiplet at 7.2 ppm (5H)
IR
2850 cm1 (sharp), 1720 cm-1, 1600 cm-1, 1503 cm!
100-
105
80
77
60-
M:
136
40-
ae 20-
40
80
120
160
miz
% Relative abundance
A compound A of mass 114 has the following elemental analysis: C = 63.14%, H=8.83%.
The IR, 1H NMR and 13C NMR spectra are given below.
1) Assign and interpret all the data from the 1H NMR and 13C NMR spectra. Propose a formula
for A.
7.0
175
с
3000
1,3; 13
I=1
6.0
150
I=1
с
5.0
CH₂
125
2000
Explain why the answer is this one :
CH,—CH,—0
4,2; 60
mavermy
I=2
cm-1
4.0
100
1500
3.0
75
135
167 |
CH₂
6
125
CH 3
1,95 ; 18
I=3
1000
2.0
50
H
5,5
I=3
1.0
CH₂
CH₂
25
500
Ppm
ppm
of
the compound whose molecular
formala is C₁₂H160₂. It's IR
22/1 Deduce the structure
Spectrum and 't nmr
Spectrum are shown.
¹H NMR Spectrum
(200 MHz, CDC1, solution)
10
9
ل
8
7
8.0
7.5
IR Spectrum
(liquid film)
expansion
6
4000
7.0
5
3000
6.5 ppm
4
2000
3
1666
1600
v (cm¹)
2
1200
1
800
TMS
0
8 (ppm)
Chapter 13 Solutions
Organic Chemistry
Ch. 13 - What is the mass of the molecular ion formed from...Ch. 13 - Prob. 13.2PCh. 13 - Prob. 13.3PCh. 13 - What molecular ions would you expect for the...Ch. 13 - The mass spectrum of 2,3-dimethylpentane also...Ch. 13 - The base peak in the mass spectrum of 2, 2,...Ch. 13 - (a) What mass spectral fragments are formed by ...Ch. 13 - What cations are formed in the mass spectrometer...Ch. 13 - The low-resolution mass spectrum of an unknown...Ch. 13 - Benzene, toluene, and p-xylene BTX are often added...
Ch. 13 - Prob. 13.11PCh. 13 - Prob. 13.12PCh. 13 - Prob. 13.13PCh. 13 - Prob. 13.14PCh. 13 - How do the IR spectra of the isomers cyclopentane...Ch. 13 - How do the three isomers of molecular formula...Ch. 13 - Problem 13.18 What functional groups are...Ch. 13 - Problem-13.19 What are the major IR absorptions in...Ch. 13 - Problem-13.20 What are the major IR absorptions in...Ch. 13 - Prob. 13.20PCh. 13 - Problem-13.22 Propose structures consistent with...Ch. 13 - 13.23 What major IR absorptions are present above ...Ch. 13 - Problem-13.24 The mass spectrum of the following...Ch. 13 - What molecular ion is expected for each compound?Ch. 13 - Which compound gives a molecular ion at m/z= 122,...Ch. 13 - Propose two molecular formulas for each molecular...Ch. 13 - Propose four possible structures for a hydrocarbon...Ch. 13 - Match each structure to its mass spectrum. a. b....Ch. 13 - 13.32 Propose two possible structures for a...Ch. 13 - 13.33 What cations are formed in the mass...Ch. 13 - 13.35 For each compound, assign likely...Ch. 13 - Prob. 13.32PCh. 13 - 13.37 Propose a structure consistent with each...Ch. 13 - 13.38 A low-resolution mass spectrum of the...Ch. 13 - Can the exact mass obtained in a high-resolution...Ch. 13 - 13.39 Primary alcohols often show a peak in their...Ch. 13 - 13.40 Like alcohols, ethers undergo α cleavage by...Ch. 13 - Which of the highlighted bonds absorbs at higher v...Ch. 13 - What major IR absorptions are present above...Ch. 13 - How would each of the following pairs of compounds...Ch. 13 - 13.44 Morphine, heroin, and oxycodone are three...Ch. 13 - Prob. 13.42PCh. 13 - 13.47 Match each compound to its IR spectrum
Ch. 13 - 13.48 Propose possible structures consistent with...Ch. 13 - A chiral hydrocarbon X exhibits a molecular ion at...Ch. 13 - 13.50 A chiral compound has a strong absorption...Ch. 13 - 13.51 Treatment of benzoic acid with followed by...Ch. 13 - 13.52 Treatment of benzaldehyde with in aqueous ...Ch. 13 - Prob. 13.49PCh. 13 - 13.54 Reaction of 2-methylpropanoic acid with ...Ch. 13 - 13.55 Reaction of pentanoyl chloride with lithium...Ch. 13 - Prob. 13.52PCh. 13 - 13.57 Treatment of anisole with and forms P,...Ch. 13 - 13.58 Reaction of with forms compound ,...Ch. 13 - Problem-13.59 The carbonyl absorption of an amide...Ch. 13 - Prob. 13.56PCh. 13 - Problem-13.61 Explain why a ketone carbonyl...Ch. 13 - 13.62 Oxidation of citronellol, a constituent of...
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