For the given Diels-Alder reaction, the products formed should be determined. Concept introduction: Cycloaddition reaction is a concerted addition reaction of two reactants to form a ring; in which two π-bonds are converted to two σ-bonds . Diels-Alder reaction is a [ 4+2 ] cycloaddition reaction, in which a π-system having four atoms (diene) and a π-system having two atoms (dienophile) are undergoing in cycloaddition reaction and producing a substituted cyclohexene . If the dienophile is having more than one π-system, then successive Diels-Alder reaction can occur. It is depending upon the quantity diene presented in the reaction. The mechanism of the ring formation in the Diels-Alder reaction is drawn by using three arrows representing the shifting of π-bonds in the two π-systems in a clockwise or counter clockwise fashion, so that the ring formation will take place. If the dienophile is a trans- alkene , then the product will be trans-product. To determine: the products formed for the given Diels-Alder reaction.

Question

Part IV. Propose a plausible Structure w/ the following descriptions: a) A 5-carbon hydrocarbon w/ a single peak in its proton decoupled the DEPT-135 Spectrum shows a negative peak C-NMR spectrum where b) what cyclohexane dione isomer gives the largest no. Of 13C NMR signals? c) C5H120 (5-carbon alcohol) w/ most deshielded carbon absent in any of its DEPT Spectiva

Answer 1

Question

Chapter 16, Problem 57PP

Interpretation Introduction

Interpretation:

For the given Diels-Alder reaction, the products formed should be determined.

Concept introduction:

Cycloaddition reaction is a concerted addition reaction of two reactants to form a ring; in which two π-bonds are converted to two σ-bonds.

Diels-Alder reaction is a [4+2] cycloaddition reaction, in which a π-system having four atoms (diene) and a π-system having two atoms (dienophile) are undergoing in cycloaddition reaction and producing a substituted cyclohexene.

If the dienophile is having more than one π-system, then successive Diels-Alder reaction can occur. It is depending upon the quantity diene presented in the reaction.

The mechanism of the ring formation in the Diels-Alder reaction is drawn by using three arrows representing the shifting of π-bonds in the two π-systems in a clockwise or counter clockwise fashion, so that the ring formation will take place.

If the dienophile is a trans-alkene, then the product will be trans-product.

To determine: the products formed for the given Diels-Alder reaction.

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