Organic Chemistry
8th Edition
ISBN: 9781337516402
Author: Brown
Publisher: Cengage
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Chapter 20, Problem 20.52P
Claisen rearrangement of an allyl phenyl ether with substituent groups in both ortho positions leads to the formation of a para-substituted product. Propose a mechanism for the following rearrangement.
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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
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The
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ethyl acetate
H NMR: 1.3 ppm, 2.0 ppm, 4.1 ppm
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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…
in the kinetics experiment, what were the values calculated? Select all that apply.a) equilibrium constantb) pHc) order of reactiond) rate contstant
Chapter 20 Solutions
Organic Chemistry
Ch. 20.1 - Prob. 20.1PCh. 20.1 - Estimate the stabilization gained as a result of...Ch. 20.2 - Predict the product(s) formed by addition of one...Ch. 20.3 - Prob. 20.4PCh. 20.3 - Prob. 20.5PCh. 20.4 - Prob. 20.6PCh. 20.5 - Prob. 20.7PCh. 20.5 - Prob. 20.8PCh. 20.5 - Prob. 20.9PCh. 20.6 - Prob. 20.10P
Ch. 20.6 - Prob. 20.11PCh. 20.6 - Prob. 20.12PCh. 20 - If an electron is added to 1,3-butadiene, into...Ch. 20 - Prob. 20.15PCh. 20 - Predict the structure of the major product formed...Ch. 20 - Predict the major product formed by 1,4-addition...Ch. 20 - Predict the structure of the major 1,2-addition...Ch. 20 - Prob. 20.19PCh. 20 - Prob. 20.20PCh. 20 - Prob. 20.21PCh. 20 - Prob. 20.22PCh. 20 - Prob. 20.23PCh. 20 - Pyridine exhibits a UV transition of the type n at...Ch. 20 - Prob. 20.25PCh. 20 - Prob. 20.26PCh. 20 - Prob. 20.27PCh. 20 - Write the frontier molecular orbital analysis for...Ch. 20 - Prob. 20.29PCh. 20 - Draw structural formulas for the products of...Ch. 20 - Propose structural formulas for compounds A and B...Ch. 20 - Under certain conditions, 1,3-butadiene can...Ch. 20 - Prob. 20.33PCh. 20 - Prob. 20.34PCh. 20 - The following triene undergoes an intramolecular...Ch. 20 - Prob. 20.36PCh. 20 - Prob. 20.37PCh. 20 - Prob. 20.38PCh. 20 - Prob. 20.39PCh. 20 - The Diels-Alder reaction is not limited to making...Ch. 20 - The first step in a synthesis of dodecahedrane...Ch. 20 - Bicyclo-2,5-heptadiene can be prepared in two...Ch. 20 - Prob. 20.43PCh. 20 - Prob. 20.44PCh. 20 - Following is a retrosynthetic scheme for the...Ch. 20 - Prob. 20.46PCh. 20 - Prob. 20.47PCh. 20 - Prob. 20.48PCh. 20 - Prob. 20.49PCh. 20 - Prob. 20.50PCh. 20 - What reaction presented in this chapter is...Ch. 20 - Claisen rearrangement of an allyl phenyl ether...Ch. 20 - Prob. 20.53PCh. 20 - Prob. 20.54PCh. 20 - We now continue the use of organic chemistry...Ch. 20 - Write the products of the following sequences of...
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