Orbital-symmetry conservation rules that determine which concerted pericyclic reactions (electrocyclic, cycloaddition, sigmatropic) are thermally vs. photochemically allowed. The sum of (4q+2)_s and (4r)_a components must be odd for a…
Orbital-symmetry conservation rules that determine which concerted pericyclic reactions (electrocyclic, cycloaddition, sigmatropic) are thermally vs. photochemically allowed. The sum of (4q+2)_s and (4r)_a components must be odd for a…