Chapter D, Problem 6PP

Interpretation Introduction

Interpretation:

The products of the given electrocyclic reactions are to be determined.

Concept introduction:

▸ Electrocyclic reactions are initiated by heat or light and are stereospecific in nature.

▸ The thermal electrocyclic reaction having $4\text{n }\Pi$ electrons takes place with conrotatory motion.

▸ The photochemical electrocyclic reaction having $4\text{n }\Pi$ electrons takes place with disrotatory motion.

▸ The photochemical electrocyclic reaction having $\left(4\text{n+2}\right)\Pi$ electrons takes place with conrotatory motion.

▸ The thermal electrocyclic reaction having $\left(4\text{n+2}\right)\Pi$ electrons takes place with disrotatory motion.