Arrange the following dienes in order of increasing reactivity in a Diels-Alder reaction by typing in the numbers undern them. For example, an answer of 1234 would indicate that you think 1 is least reactive and 4 is most reactive (with 4 more reactive than 3 and so forth). H3C H3C H3C 1 2 3 Enter Your Answer: How many pairs of degenerate p molecular orbitals do you expect for the following cation? ( Enter Your Answer:

Arrange the following dienes in order of increasing reactivity in a Diels-Alder reaction by typing in the numbers undern them. For example, an answer of 1234 would indicate that you think 1 is least reactive and 4 is most reactive (with 4 more reactive than 3 and so forth). H3C H3C H3C 1 2 3 Enter Your Answer: How many pairs of degenerate p molecular orbitals do you expect for the following cation? ( Enter Your Answer:

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter20: Dienes, Conjugated Systems, And Pericyclic Reactions

Section: Chapter Questions

Problem 20.33P

See similar textbooks

Similar questions

This is a Diels-Alder reaction between furan + maleic anhydride (endo and exo products). For each cycloaddition product, draw in all hydrogen atoms, and write the molecular formula below.
Rank the following dienes from most reactive to least reactive in a Diels Alder reaction. please explain steps
How would the molecular orbitals of cyclopenta-1,3-diene, the carbocation, carbanion, and the radical differ? Drawings would be appreciated! Thank you in advance.
Chemistry Give the products of the reaction of 1 mole of 2-methy1-1,3-pentadiene with 1 mole of HBr. Whichproduct(s) will predominate if the reaction is under kinetic control? Which products) will predominateif the reaction is under thermodynamic control?
Although the Dielsâ€“Alder reaction generally occurs between an electronrich diene and an electron-deficient dienophile, it is also possible to have inverse-demand Dielsâ€“Alder reactions between suitable electrondeficient conjugated double bonds and electron-rich alkenes. These reactions are particularly useful because they allow for the incorporation of heteroatoms into the new six-membered ring. Predict the products of each inverse-demand Dielsâ€“Alder reaction below. Be sure your products reflect the correct stereochemistry. If more than one regioisomer is possible, draw both.
Give the structure(s) of the product(s) of each reaction. Indicate any relative stereochemistry, assuming that each of the Diels-Alder reactions will proceed with endo selectivity. If more than one product is formed, please indicate which one will be the major product or if they will be formed in equal amounts. If no reaction is expected to occur under the indicated conditions, then write "no reaction" or NR, and explain why you would expect nothing to occur. In all cases, equimolar amounts of both components/reagents are present unless indicated otherwise.
A2 What is the inverse electron demand Diels–Alder reaction? Please pick a pair of a diene and a dienophile from the following dienes and dienophile that will undergo this type of reaction. Please show how this reaction works using Frontier Molecular Orbitals. What is the reaction product?
Furan and maleimide undergo a Diels–Alder reaction at 25 °C to give the endo isomer of the product. When the reactiontakes place at 90 °C, however, the major product is the exo isomer. Further study shows that the endo isomer of theproduct isomerizes to the exo isomer at 90 °C.furan: O maleimide:OON H(a) Draw and label the endo and exo isomers of the Diels–Alder adduct of furan and maleimide.(b) Which isomer of the product would you usually expect from this reaction? Explain why this isomer is usually favored.(c) Examine your answer to (b) and determine whether this answer applies to a reaction that is kinetically controlled orone that is thermodynamically controlled, or both.(d) Explain why the endo isomer predominates when the reaction takes place at 25 °C and why the exo isomer predominates at 90 °C
Which of the following substances in each per will be the most reactive in SN2 reactions? justify
Rank the following dienes in order of their reactivity in standard Diels-Alder reactions (1= most reactive, 4= least reactive). Be sure to briefly explain your choices.
Which of the following compounds can arise directly from a Diels-Alder reaction? Circle any structures that can. Then, identify the appropriate diene(s) and dienophile(s) that would lead to the compound. Pay attention to E-/Z- stereochemistry in all of the reactants. For those that cannot undergo a Diels-Alder reaction, please explain why.
Give the structure of the main product of each of the following Diels-Alder reactions. Make sureto show the stereochemistry of the products when unambiguous.