Example image of eyePlorer eyePlorer map for 'Sigmatropic reaction': Chemical reaction Intramolecular reaction Organic chemistry Pericyclic reaction Sigma bond Carbon Compound (linguistics) Pi bond Rearrangement reaction Substituent Catalysis Lewis acids and bases Carroll rearrangement Claisen rearrangement Cope rearrangement Fischer indole synthesis Atom Hydrogen Atomic orbital Rotation Stereochemistry Antarafacial and suprafacial Hydride Thermal radiation Woodward–Hoffmann rules Acid Base Enol Moebius Topology Transition state Alkyl Cyclic compound Diradical Triplet state Aromatic hydrocarbon Carbonyl Reaction rate 1,3-Cyclohexadiene Electrocyclic reaction Lumisterol Methyl group Vitamin D Bicyclic molecule Valence (chemistry) Electron Rainer Ludwig Claisen Chemical bond Allyl Ether