The observation that cyclohexadecaoctaene isomerizes to two different isomers depending on reaction conditions is to be explained indicating whether each reaction is conrotatory or disrotatory. Concept introduction: An electrocyclic reaction involves the cyclization of a conjugated acyclic system. These reactions are reversible and are highly stereospecific. 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. To explain: The observation that cyclohexadecaoctaene isomerizes to two different isomers depending on reaction conditions. To indicate: Whether each reaction is conrotatory or disrotatory.

Question

k₁ Given the reaction R₂ R + R, indicate k-1 (A). the rate law with respect to R2: (B). the rate law with respect to R: d[R₂] dt d[R] dt

Answer 1

Question

Chapter 30.SE, Problem 24AP

Interpretation Introduction

Interpretation:

The observation that cyclohexadecaoctaene isomerizes to two different isomers depending on reaction conditions is to be explained indicating whether each reaction is conrotatory or disrotatory.

Concept introduction:

An electrocyclic reaction involves the cyclization of a conjugated acyclic system. These reactions are reversible and are highly stereospecific.

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.

To explain:

The observation that cyclohexadecaoctaene isomerizes to two different isomers depending on reaction conditions.

To indicate:

Whether each reaction is conrotatory or disrotatory.

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