Concept explainers
Interpretation:
The two product in the given reaction are formed after [1, 7] sigmatropic rearrangement, one due to hydrogen migration and the other to deuterium migration. It should be represented the configuration of product by replacing the A and B with appropriate atoms (H or D)
Concept introduction:
In a sigmatropic reaction “ one new sigma-bond is formed as another breaks.”
Sigma tropic rearrangement reactions are designated with digits. For example a [1, 3] sigma tropic rearrangement describe a reaction in which the residue migrates from position 1 to position 3
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 sigma tropic rearrangement reactions are listed below
Migration of carbon and hydrogen will occur in a sigmatropic rearrangement reaction. Migration of hydrogen in suprafacial and antarafacial rearrangement can be represented as follows,
Carbon migrating with one lobe of its p orbital interacting
Carbon migrating with both lobe of its p orbital interacting

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Chapter 28 Solutions
CHEM 262 ORG CHEM EBOOK DIGITAL DELIVERY
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- Please handwriting for questions 1 and 3arrow_forwardIs (CH3)3NHBr an acidic or basic salt? What happens when dissolved in aqueous solution? Doesn't it lose a Br-? Does it interact with the water? Please advise.arrow_forward© Macmilla Finish resonance structure 3 Select Draw Templates More C H N 0 H H S Erase Which structure is the most stable (lowest energy) resonance contributor? The structure with the positive charge on nitrogen and negative charges on oxygen and sulfur. All structures are equal in stability. The structure with the positive charge on nitrogen and negative charges on sulfur and carbon. The structure with the positive charge on nitrogen and negative charges on oxygen and carbon. Q2Qarrow_forward
- Three pure compounds are formed when 1.00 g samples of element x combine with, respectively, 0.472 g, 0.630 g, and 0.789 g of element z. The first compound has the formula x2Z3. find the empricial formula of the other two compoundsarrow_forwardDraw the product and the mechanism A. excess H*; 人 OH H*; B. C. D. excess OH ✓ OH H*; H₂O 1. LDA 2. H*arrow_forwardIn reactions whose kinetic equation is v = k[A]m, the rate coefficient k is always positive. Is this correct?arrow_forward
- If the concentration of A decreases exponentially with time, what is the rate equation? (A). -d[A] (B). dt d[A] = k[A] e-kt dtarrow_forwardGiven the first-order reaction: aA → products. State its kinetic equation.arrow_forwardDetermine the symmetry of the combination of atomic orbitals for bf 4-arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning

