EBK ORGANIC CHEMISTRY
9th Edition
ISBN: 9780100591318
Author: McMurry
Publisher: YUZU
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Question
Chapter 2.9, Problem 16P
Interpretation Introduction
Interpretation:
The pKa of HCN is given. Its Ka is to be calculated.
Concept introduction:
pKa is defined as negative common logarithm of the Ka values.
pKa=-logKa
By substituting the pKa value in this equation the value of Ka can be calculated.
To calculate:
The Ka value of HCN from its pKa value.
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Part VII. The H-NMR of a compound with molecular formula C5 H 10 O2 is given below.
Find the following:
(a) The no. of protons corresponding to each signal in the spectra
(6) Give the structure of the compound and assign the signals to each
proton in the compound.
a
70.2
Integration Values
C5H10O2
b
47.7
C
46.5
d
69.5
3.6 3.5
3.4 3.3 3.2 3.1 3.0
2.9 2.8
2.7
2.6 2.5
2.4 2.3 2.2 2.1 2.0
Chemical Shift (ppm)
1.9
1.8
1.7 1.6
1.5
1.4 1.3 1.2
1.1 1.0
0.9 0.8
Part 111. 1 H-NMR spectrum of a compound with integration values in red is given below.
Answer the following:
(a) write the signals in the 'H-NMR spectrum to the corresponding protons on the structure
of the molecule below.
(b) Identify the theoretical multiplicities for each proton in the compound. Also give the possible.
complex splitting patterns assuming J values are not similar.
там
Br
22
2
3
6
4 7.2 7.0 6.8 6.6 6.4 6.2 6.0 5.8 5.6 5.4 5.2 5.0 4.8 4.6 4.4 4.2 4.0 3.8 3.6 3.4 3.2 3.0 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 0.8 0
Chemical Shift (ppm)
ra.
Br
2
3
6
6
2.5
2.4
2.3
2.2
2.1
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
Chemical Shift (ppm)
2
2
Br
7.3
7.2
7.1
7.0 6.9
6.7 6.6 6.5
6.4
6.3
6.2
6.1
6.0
Chemical Shift (ppm)
5.9
5.8 5.7
5.5 5.4 5.3 5.2
5.0 4.9
1600°
1538°C
1493°C
In the diagram, the letter L indicates
that it is a liquid. Indicate its
components in the upper region
where only L is indicated.
The
iron-iron carbide phase
diagram.
Temperature (°C)
1400
8
1394°C
y+L
1200
2.14
y, Austenite
10000
912°C
800a
0.76
0.022
600
400
(Fe)
a, Ferrite
Composition (at% C)
15
1147°C
a + Fe3C
2
3
Composition (wt% C)
L
2500
4.30
2000
y + Fe3C
727°C
1500
Cementite (Fe3C)
1000
4
5
6
6.70
Temperature (°F)
Chapter 2 Solutions
EBK ORGANIC CHEMISTRY
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Ch. 2.7 - Nitric acid (HNO3) reacts with ammonia (NH3) to...Ch. 2.8 - Prob. 12PCh. 2.8 - Amide ion, H2N-, is a much stronger base than...Ch. 2.9 - Prob. 14PCh. 2.9 - Prob. 15PCh. 2.9 - Prob. 16PCh. 2.11 - Using curved arrows, show how the species in part...Ch. 2.11 - Prob. 18PCh. 2.12 - Of the two vitamins A and C, one is hydrophilic...Ch. 2.SE - Prob. 20VCCh. 2.SE - The following model is a representation of...Ch. 2.SE - cis-l, 2-Dichloroethylene and trans-1,...Ch. 2.SE - The following molecular models are representations...Ch. 2.SE - Predict the product(s) of the acid/base reactions...Ch. 2.SE - Use curved arrows to draw the protonated form of...Ch. 2.SE - Prob. 26MPCh. 2.SE - Double bonds can also act like Lewis bases,...Ch. 2.SE - Prob. 28APCh. 2.SE - Use the electronegativity table given in Figure...Ch. 2.SE - Which of the following molecules has a dipole...Ch. 2.SE - Prob. 31APCh. 2.SE - Phosgene, C12C=O, has a smaller dipole moment than...Ch. 2.SE - Prob. 33APCh. 2.SE - Methanethiol, CH3SH, has a substantial dipole...Ch. 2.SE - Calculate the formal charges on the atoms shown in...Ch. 2.SE - Assign formal charges to the atoms in each of the...Ch. 2.SE - Which of the following pairs of structures...Ch. 2.SE - Prob. 38APCh. 2.SE - 1, 3-Cyclobutadiene is a rectangular molecule with...Ch. 2.SE - Alcohols can act either as weak acids or as weak...Ch. 2.SE - The O-H hydrogen in acetic acid is more acidic...Ch. 2.SE - Draw electron-dot structures for the following...Ch. 2.SE - Write the products of the following acid-base...Ch. 2.SE - Rank the following substances in order of...Ch. 2.SE - Which, if any, of the substances in Problem 2-44...Ch. 2.SE - The ammonium ion (NH4+, pKa = 9.25) has a lower...Ch. 2.SE - Prob. 47APCh. 2.SE - Prob. 48APCh. 2.SE - Calculate Ka values from the following pka’s:...Ch. 2.SE - Calculate pKa values from the following Ka’s:...Ch. 2.SE - What is the pH of a 0.050 M solution of formic...Ch. 2.SE - Prob. 52APCh. 2.SE - Maleic acid has a dipole moment, but the closely...Ch. 2.SE - Assume that you have two unlabeled bottles, one of...Ch. 2.SE - Identify the acids and bases in the following...Ch. 2.SE - Which of the following pairs represent resonance...Ch. 2.SE - Draw as many resonance structures as you can for...Ch. 2.SE - Carbocations, which contain a trivalent,...Ch. 2.SE - We’ll see in the next chapter that organic...Ch. 2.SE - The azide functional group, which occurs in...Ch. 2.SE - Phenol, C6H5OH, is a stronger acid than methanol,...Ch. 2.SE - Thiamin diphosphate (TPP), a derivative of vitamin...Ch. 2.SE - Determine if each compound or ion below has a...Ch. 2.SE - Prob. 64APCh. 2.SE - Prob. 65APCh. 2.SE - Draw the conjugate base for each compound below...Ch. 2.SE - 1, 1, 1-Trichloroethanol is an acid more than 1000...
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