Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN: 9781938168390
Author: Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher: OpenStax
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Textbook Question
Chapter 12, Problem 81E
For each of the following pairs of reaction diagrams, identify which of the pairs is catalyzed:
Expert Solution & Answer
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each pair of substrates below, choose the one that will react faster in a substitution reaction, assuming that:
1. the rate of substitution doesn't depend on nucleophile concentration and
2. the products are a roughly 50/50 mixture of enantiomers.
Substrate A
Substrate B
Faster Rate
X
Ś
CI
(Choose one)
(Choose one)
CI
Br
Explanation
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Br
(Choose one)
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NMR spectrum of ethyl acetate has signals whose chemical shifts are indicated below. Which hydrogen or set of hydrogens corresponds to the signal at
4.1 ppm? Select the single best answer.
The
H
O
HỌC—C—0—CH, CH,
2
A
ethyl acetate
H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm
Check
OA
B
OC
ch
B
C
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How many signals do you expect in the H NMR spectrum for this molecule?
Br Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red
Note for advanced students: In this question, any multiplet is counted as one signal.
1
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
Check
For the molecule in the bottom drawing area, highlight in red any other H atoms that will contribute
to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
O
✓
No additional Hs to color in top
molecule
ง
No additional Hs to color in bottom…
Chapter 12 Solutions
Chemistry by OpenStax (2015-05-04)
Ch. 12 - What is the difference between average rate,...Ch. 12 - Ozone decomposes to oxygen according to the...Ch. 12 - In the nuclear industry, chlorine trifluoride is...Ch. 12 - A study of the rate of dimerization of C4H6 gave...Ch. 12 - A study of the rate of the reaction represented as...Ch. 12 - Consider the following reaction in aqueous...Ch. 12 - Describe the effect of each of the following on...Ch. 12 - Explain why an egg cooks move slowly in boiling...Ch. 12 - Go to the PhET Reactions and change to Angled...Ch. 12 - In the PhET Reactions tab to observe how multiple...
Ch. 12 - In the PhET Reactions under Options. (a) Leave...Ch. 12 - How do the rate of a reaction and its rate...Ch. 12 - Doubling the concentration of a reactant increases...Ch. 12 - Tripling the concentration of a reactant increases...Ch. 12 - How much and in what direction will each of the...Ch. 12 - How will each of the following affect the rate of...Ch. 12 - Regular ?ights of supersonic aircraft in the...Ch. 12 - Radioactive phosphorus is used in the study of...Ch. 12 - The rate constant for the radioactive decay of 14C...Ch. 12 - The decomposition of acetaldehyde is a second...Ch. 12 - Alcohol is removed from the bloodstream by a...Ch. 12 - Under certain conditions the decomposition of...Ch. 12 - Nitrosyl chloride, NOCI, decomposes to NO and CI2....Ch. 12 - From the following data, determine the rate...Ch. 12 - Nitrogen monoxide reacts with chlorine according...Ch. 12 - Hydrogen reacts with nitrogen monoxide to form...Ch. 12 - For the reaction AB+C, the following data were...Ch. 12 - For the reaction QW+X, the following data were...Ch. 12 - The rate constant for the ?rst-order decomposition...Ch. 12 - The annual production of HNO3 in 2013 was 60...Ch. 12 - The following data have been determined for the...Ch. 12 - Describe how graphical methods can be used to...Ch. 12 - Use the data provided to graphically determine the...Ch. 12 - Use the data provided in a graphical method to...Ch. 12 - Pure ozone decomposes slowly to oxygen, 2O33O2(g)....Ch. 12 - From the given data, use a graphical method to...Ch. 12 - What is the half-life for the first-order decay of...Ch. 12 - What is the half-life for the first-order decay of...Ch. 12 - What is the half-life for the decomposition of...Ch. 12 - What is the half-life for the decomposition of O3...Ch. 12 - The reaction of compound A to give compounds C and...Ch. 12 - The half-life of a reaction of compound A to give...Ch. 12 - Some bacteria are resistant to the antibiotic...Ch. 12 - Both technetium-99 and thallium-201 are used to...Ch. 12 - There are two molecules with the formula C3H6...Ch. 12 - Fluorine-18 is a radioactive isotope that decays...Ch. 12 - Suppose that the half-life of steroids taken by an...Ch. 12 - Recently, the skeleton of King Richard III was...Ch. 12 - Nitroglycerine is an extremely sensitive...Ch. 12 - For the past 10 years, the unsaturated hydrocarbon...Ch. 12 - Chemical reactions occur when reactants collide....Ch. 12 - When every collision between reactants leads to a...Ch. 12 - What is the activation energy of a reaction, and...Ch. 12 - Account for the relationship between the rate of a...Ch. 12 - Describe how graphical methods can be used to...Ch. 12 - How does an increase in temperature affect rate of...Ch. 12 - The rate of a certain reaction doubles for every...Ch. 12 - In an experiment, a sample of NaClO3 was 90%...Ch. 12 - The rate constant at 325 C for the decomposition...Ch. 12 - The rate constant for the decomposition of...Ch. 12 - An elevated level of the enzyme alkaline...Ch. 12 - In terms of collision theory, to which of the...Ch. 12 - Hydrogen iodide, HI, decomposes in the gas phase...Ch. 12 - The element Co exists in two oxidation states,...Ch. 12 - The hydrolysis of the sugar sucrose to the sugars...Ch. 12 - Use the PhET Reactions Single collision" tab of...Ch. 12 - Use the PhET Reactions Single collision tab of the...Ch. 12 - Why awe elementary reactions involving three or...Ch. 12 - In general, can we predict the effect of doubling...Ch. 12 - Define these terms: (a) unimolecular reaction (b)...Ch. 12 - What is the rate equation for the elementary...Ch. 12 - Given the following reactions and the...Ch. 12 - Write the rate equation for each of the following...Ch. 12 - Nitrogen (Il) oxide, NO, reacts with hydrogen, H2,...Ch. 12 - Experiments were conducted to study the rate of...Ch. 12 - The reaction of CO with CI2 gives phosgene...Ch. 12 - . Account for the increase in reaction rate...Ch. 12 - Compare the functions of homogeneous and...Ch. 12 - Consider this scenario and answer the following...Ch. 12 - For each of the following pairs of reaction...Ch. 12 - For each of the following pairs of reaction...Ch. 12 - For each of the following reaction diagrams,...Ch. 12 - For each of the following reaction diagrams,...Ch. 12 - Based on the diagrams in Exercise 12.83, which of...Ch. 12 - Based on the diagram in Exercise 12.83, which of...
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