The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition are to be identified. Further how the reactions occur also is to be stated. Concept introduction: In cycloaddition reaction two unsaturated molecules add to one another to yield a cyclic product If even number of electron pair is involved then thermal reaction occur through antarafacial pathway and photochemical reactions occur through suprafacial pathway. If odd number of electron pair is involved then thermal reaction occur through suprafacial pathway and photochemical reactions occur through antarafacial pathway. To identify: The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition and to state how they occur.

Question

Please draw the structure in the box that is consistent with all the spectral data and alphabetically label all of the equivalent protons in the structure (Ha, Hb, Hc....) in order to assign all the proton NMR peaks. The integrations are computer generated and approximate the number of equivalent protons. Molecular formula: C13H1802 14 13 12 11 10 11 (ppm) Structure with assigned H peaks 2.08 3.13

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Question

Chapter 30.SE, Problem 26AP

Interpretation Introduction

Interpretation:

The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition are to be identified. Further how the reactions occur also is to be stated.

Concept introduction:

In cycloaddition reaction two unsaturated molecules add to one another to yield a cyclic product

If even number of electron pair is involved then thermal reaction occur through antarafacial pathway and photochemical reactions occur through suprafacial pathway.

If odd number of electron pair is involved then thermal reaction occur through suprafacial pathway and photochemical reactions occur through antarafacial pathway.

To identify:

The two pericyclic reactions involved in the two step process, a cycloaddition and a reverse cycloaddition and to state how they occur.

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