Concerted Two-Electron Transfer and High Selectivity of TiO2 in Photocatalyzed Deoxygenation of Epoxides.

No two ways about it: In the photocatalytic deoxygenation of epoxides, the TiO2 particle concertedly transfers two stored electrons to generate a carbanion intermediate, which dissociates to the alkene product. This pathway ensures the higher alkene and stereoselectivity of the photocatalytic deoxygenation than those involving a single‐electron transfer. [ABSTRACT FROM AUTHOR]