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Click the structures and reaction arrows in sequence to view the 3D models and animations respectively

E1 describes an elimination reaction in which the rate-determining step is unimolecular and does not involve the base. The leaving group leaves in this step, and a proton is removed in a second step. This is an example of an E1 reaction which shows the formation of an alkene.

Other pages of interest to do with Animated Molecular Orbitals are

Introduction to Animated Molecular Orbitals | Introductory Organic Reactions

J. F. Bunnett, Angew. Chemie Int. Ed. English, 1962, 1, 225–235.