One possible cycle is initiated by the direct oxidative addition of a C(sp 2 )-F bond to Ni(0) (left, cycle A). Transmetalation with the hydrosilane and reductive elimination then furnish the monofluoroalkene. The same catalytic cycle gives the vinyl arene. Another possible cycle is mediated by Ni-H species generated via the oxidative addition of the hydrosilane. The coordination and insertion of difluoroalkene generate a benzyl