Molecular orbital calculations on the reactivity of o-benzoquinones towards dienes

The Diels-Alder reactivity of a number of o-benzoquinones has been investigated using localization theory. The behaviour of o-benzoquinones as philodienes can be satisfactorily explained in terms of paralocalization energy. The bond localization concept is useful in explaining the dienophilic character associated with the double bonds in o-benzoquinones