Interpretation:
It should be explained that why compound A will not undergo a ring – opening reaction under thermal conditions, but compound B will.
Concept introduction:
Conjugated system: A system of connected p-orbitals with delocalized electrons with alternating single and multiple bonds and the compound may be cyclic, linear or mixed
Woodward –Hoffmann rules are the set of rules used to vindicate or predict certain aspects of the stereo chemical outcome and activation energy of pericyclic reactions.
Woodward – Hoffmann rules for pericyclic reactions are listed below
Woodward – Hoffmann rules for the configuration of pericyclic reactions are,
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Chapter 28 Solutions
ORGANIC CHEMISTRY-PACKAGE
- a) Which base would be the best base to use for both of these and why? b) Give the expected product for the Claisen condensation reaction of A). c) Compound A) will successfully undergo a Claisen condensation reaction, however, Compound B) will not. Briefly explain why, and show the form of the product for Compound A) that makes the reaction possible.arrow_forwardA. Provide the necessary reagents. B. Provide the necessary eragnets and the step by step mechanism.arrow_forwardDraw a reasonable arrow -pushing mechanism that explains formation of the given products.arrow_forward
- Give clear handwritten mechanism of the reaction with curved arrows!arrow_forwardPropose a curved arrow mechanism to account for the formation of compound C.arrow_forwardWhy does the carbomethoxy group directs the reaction to positions that are meta to it ?b) Why the formation of dinitrobenzaote is substantially disfavored ?c) Would you expect small amounts of the ortho and para substituted product ? How would you remove them if they are formed ?d) Why does water have a retarding effect on the nitration ?e) Explain why Benzene has lower reactivity in electrophilic addition reactions than cyclohexene?arrow_forward
- Which reaction would most likely occur and why: e2 or e1?arrow_forwardwhat is the alkene that would give the product ( a or b)?and why?arrow_forwardStarting from left to right compound A is in the left (the second ring on the right is closed, it is not shown clearly) and compound C is in the left, compound B is in the middle Choose the following choices which will not undergo Diels Alder reactionarrow_forward
- a) place asterisks(*) at the allylic position of compound A. b) Draw the resonance forms of the allylic radical intermediate that accounts for the formation of B and C.arrow_forwardExplain why compound A is much more stable than compound B.?arrow_forwardGive a clear handwritten answer...give the mechanism with curved arrows given bleow reaction...arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage Learning