Abstract

Modern electronic structure methods including complete active space perturbation theory to second order (CASPT2), and a range of density functional (DFT) methods are used to characterize the intermediates and transition states associated with ethylene epoxidation by chromyl chloride. A novel zwitterionic direct addition pathway is characterized which, when coupled with a dinuclear complex, exothermically produces epoxide through a pathway with a small kinetic barrier.

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