Pericyclic reactions (intro)
Advanced Organic (UG) · Chemistry
Molecule viewer
Interactive 3DBall-and-stick models with true bond angles — switch molecule to compare shapes.
Controls
Drag the sliders or type a value — the simulation updates live.
Study notes
Predict: trans-hexatriene heated gives which cyclohexadiene stereoisomer? Step 1: 6 π electrons = 4n+2 system, thermal. Step 2: Woodward–Hoffmann: thermal 4n+2 → disrotatory closure. Step 3: Disrotatory: ends rotate opposite → trans substituents → trans product. Step 4: Orbital symmetry predicts stereochemistry — no mechanism needed!