SEARCH Articles Figures Tables Hoffmann Hoffmann reaction Pericyclic Pericyclic reactions Pericyclic reactions Woodward-Hoffmann rules for Reaction rule Rules reaction rule Woodward Woodward reaction Woodward-Hoffmann Woodward-Hoffmann pericyclic Woodward-Hoffmann reactions Woodward-Hoffmann rules Woodward-Hoffmanns Generalized Rules for Pericyclic Reactions