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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Chapter 30 Solutions
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