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Chapter 16: PROBLEM 16.52 (page 637)

Question: Compounds containing triple bonds are also Diels鈥揂lder dienophiles. With this in mind, draw the products of each reaction.

a.

b.

Short Answer

Expert verified

a.

Product of a.

b.

Product of b.

Step by step solution

01

Arrangement of diene and dienophile

The diene and the triple bonded species are placed in the same manner as the diene and dienophile for the Diels-Alder reaction.

02

Triple bond in dienophile

The triple bond also behaves as the dienophiles in the Diels-Alder reaction. On undergoing the said reaction, the double bond is left after the cleavage of one bond of the dienophile

03

Diene and dienophile for the given products

a. The structures are re-drawn, and the bonds are cleaved in the represented manner to form a six-membered ring.

Product of a.

b. The structures are re-drawn, and the bonds are cleaved in the represented manner to form a six-membered ring.

Product of b.

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Most popular questions from this chapter

Question: Addition of HCl to alkene X forms two alkyl halides Y and Z.

a. Label Y and Z as a 1,2-addition product or a 1,4-addition product.

b. Label Y and Z as the kinetic or thermodynamic product and explain why.

c. Explain why addition of HCl occurs at the indicated C=C(called an exocyclic double bond), rather than the other C=C (called an endocyclic double bond).

Question: Which of the following molecules absorbs a longer wavelength of UV light?

Question: Intramolecular Diels鈥揂lder reactions are possible when a substrate contains both a 1,3-diene and a dienophile, as shown in the following general reaction.

With this in mind, draw the product of each intramolecular Diels鈥揂lder reaction.

a.

b.

Question: Draw the products of each Diels鈥揂lder reaction, and indicate the stereochemistry.

a.

b.

c.

Question: Draw a second resonance structure for each carbocation. Then draw the hybrid.

a.

b.

c.
See all solutions

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