We report herein the use of the (dihydrido) iron catalyst, Fe(H)(2)(dmpe)(2), for the selective reduction of CO2 into either bis(boryl)acetal or methoxyborane depending on the hydroborane used as a reductant. In a one-pot two-step procedure, the in situ generated bis(boryl)acetal was Shown to be a reactive and versatile source of methylene to create new C-N but also C-O and C-C bonds.