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Diels-Alder Cycloaddition: [4+2] Reaction Coordinate (2D)

Interactive 2D Diels-Alder [4+2] cycloaddition simulator: watch a diene and dienophile pass through a single concerted transition state as both new sigma bonds form simultaneously, tune electron-donating and electron-withdrawing substituent strength, and see the computed HOMO-LUMO gap drive activation energy and Arrhenius reaction rate live.

Chemistry & Materials2DAdvanced60 FPS📱 Mobile-adapted⇄ 3D version

This simulator renders a 2D reaction-coordinate diagram for the Diels-Alder [4+2] cycloaddition: a diene and a dienophile approach, pass through a single concerted transition state, and fuse into a cyclohexene ring as two new σ bonds form together, not one after the other. Scrub or play the progress slider to watch bond lengths and the potential-energy curve evolve, and push the electron-donating (diene) and electron-withdrawing (dienophile) substituent sliders to narrow the computed HOMO–LUMO gap, drop the activation energy and watch the Arrhenius rate constant — and the rate-vs-strength chart — respond live.

⚙ Under the hood

Drive a diene and dienophile along a real 3D reaction coordinate through the concerted [4+2] transition state to a cyclohexene product, and see how substituents, endo/exo approach and temperature change the activation energy and Arrhenius rate.

organic chemistrydiels-aldercycloadditionreaction mechanismkineticsstereochemistry

2D · HTML5 Canvas 2D · 60 FPS target · runs fully client-side, no install