Facile access to halogenated cationic BC-centered organoborons isoelectronic with alkenyl halides.

A facile strategy to prepare halogenated cationic BC-centered organoboron analogues of alkenyl halides via the reaction between carbodiphosphoranes (CDPs) and aryl dihaloboranes is reported. Structural comparison of the halogen and alkoxy derivatives, as well as detailed computational studies, corroborates the polarized double dative bonding nature of the central BC double bonds.