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,
Trending nowThis is a popular solution!
Chapter 28 Solutions
Organic Chemistry
- What are the most likely products of a reaction between CH3CH2NH3 and H2O? a. CH3CH2NH3++OH b. (CH3)2NH2++OH c. CH3CH2NH2OH+H+ d. (CH2)NH2+H3O+arrow_forwardAcyclovir is an effective antiviral agent used to treat the herpes simplexvirus. (a) Draw the enol form of acyclovir, and explain why it is aromatic.(b) Why is acyclovir typically drawn in its keto form, despite the fact thatits enol is aromatic?arrow_forwardConsider the tetracyclic compound with rings labeled A–D. (a) Which ring is the most reactive in electrophilic aromatic substitution? (b) Which ring is the least reactive in electrophilic aromatic substitution?arrow_forward
- When the compound below is treated with a base, kinetic product A and thermodynamic product B,can be formed depending on the base and temperature. Draw the structures for A and B and writethe mechanism for the formation of the thermodynamic productarrow_forwardExplain why the reaction in Problem 18.48 proceeds dramatically more slowly under neutral conditions than under either acidic or basic conditions.arrow_forwardArrange the following in order of increasing stability A B Darrow_forward
- Complete the following reaction scheme. Draw the structure for compound A and B.arrow_forwardIdentify compound A to E.arrow_forwardConsider carbonyl compounds A–E drawn below. (a) Rank A–E in order of increasing stability. (b) Rank A–E in order of increasing amount of hydrate formed when treated with aqueous acid. (c) Which compound is most reactive in nucleophilic addition?arrow_forward
- Organic Chemistry: A Guided InquiryChemistryISBN:9780618974122Author:Andrei StraumanisPublisher:Cengage LearningChemistry for Today: General, Organic, and Bioche...ChemistryISBN:9781305960060Author:Spencer L. Seager, Michael R. Slabaugh, Maren S. HansenPublisher:Cengage Learning