Question

(b) Thermal
(2+2) pi

forbidden. Explain.
cycloaddition
is​

Answer 1

Explanation:

Concerted [2π + 2π] cycloaddition

The reaction is described as thermally LUMO pair we use, there is one bonding interaction and one antibonding interaction; this kind of face-to-face thermal [2 + 2] cycloaddition cannot be a

forbidden.... No matter which HOMO

concerted process.