a) Interpretation: Whether the electrocyclic reaction shown takes place in conrotatory or disrotatory manner is to be stated. The conditions, thermal or photochemical, under which the reaction can be carried out also is to be stated. Concept introduction: In elecrocyclic reactions involving even number of electron pairs, a thermal reaction occurs in conrotatory manner and a photochemical reaction occurs in disrotatory manner. In elecrocyclic reactions involving odd number of electron pairs, a thermal reaction occurs in disrotatory manner and a photochemical reaction occurs in conrotatory manner.

Question

A covalent bond is the result of the a) b) c) d) e) overlap of two half-filled s orbitals overlap of a half-filled s orbital and a half-filled p orbital overlap of two half-filled p orbitals along their axes parallel overlap of two half-filled parallel p orbitals all of the above

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Question

Chapter 30.SE, Problem 18AP

Interpretation Introduction

a)

Interpretation:

Whether the electrocyclic reaction shown takes place in conrotatory or disrotatory manner is to be stated. The conditions, thermal or photochemical, under which the reaction can be carried out also is to be stated.

Concept introduction:

In elecrocyclic reactions involving even number of electron pairs, a thermal reaction occurs in conrotatory manner and a photochemical reaction occurs in disrotatory manner.

In elecrocyclic reactions involving odd number of electron pairs, a thermal reaction occurs in disrotatory manner and a photochemical reaction occurs in conrotatory manner.

Interpretation Introduction

b)

Interpretation:

Whether the electrocyclic reaction shown takes place in conrotatory or disrotatory manner is to be stated. The conditions, thermal or photochemical, under which the reaction can be carried out also is to be stated.

Concept introduction:

In elecrocyclic reactions involving even number of electron pairs, a thermal reaction occurs in conrotatory manner and a photochemical reaction occurs in disrotatory manner.

In elecrocyclic reactions involving odd number of electron pairs, a thermal reaction occurs in disrotatory manner and a photochemical reaction occurs in conrotatory manner.

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