Each of the following transformations is believed to proceed by a sequence of reactions concerted. Indicate what happens at each step. b) hv CH,O0CC Co OH HO CH CH3 CH3. CH3 CH3 CH3 D 300'C CH3- "CH3 c) CH3 300°C D- HH hu H H. d)
Each of the following transformations is believed to proceed by a sequence of reactions concerted. Indicate what happens at each step. b) hv CH,O0CC Co OH HO CH CH3 CH3. CH3 CH3 CH3 D 300'C CH3- "CH3 c) CH3 300°C D- HH hu H H. d)
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Transcribed Image Text:Each of the following transformations is believed to proceed by a sequence of reactions concerted.
Indicate what happens at each step.
b)
hv
CH,OOCC
OHCH
OH
"D
H
H.
H
CH CH3
CH3.
CH3
CH3 CH3
300°C CH3.
300°C
"CH3
c)
CH3
D-
D
D
hv
H H.
d)
H
Expert Solution
Step 1
A pericyclic reaction takes place via a concerted mechanism in which the old bond breaking and a new bond formation occur at the same time.
These reactions don't form any intermediate instead, they proceed via a transition state.
The pericyclic reactions take place mostly in conjugated polyene systems and no special reagents are needed to carry out these reactions.
We mainly need two conditions to undergo these reactions:
- Thermal condition: heat is provided.
- Photochemical condition: light is provided designated by .
The stereochemistry of the reactions is mainly decided by the Woodward-Hoffmann rules.
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