SEARCH Articles Figures Tables Claisen rearrangement suprafacial geometry Cope rearrangement suprafacial geometry Sigmatropic rearrangement suprafacial geometry Sigmatropic rearrangement suprafacial migration Sigmatropic rearrangements photochemical suprafacial Sigmatropic rearrangements suprafacial Sigmatropic rearrangements suprafacial allowed Sigmatropic rearrangements suprafacial allowed photochemically Sigmatropic rearrangements suprafacial photochemically Sigmatropic rearrangements suprafacial processes Suprafacial Suprafacial -rearrangement of cyclopentadiene (C) Suprafacial allyl rearrangements Suprafacial migration rearrangement Suprafacial rearrangements, defined