Reactivity of the Electron-Rich Allenylidene−Ruthenium Complexes [Cp*RuCCC(R)Ph(dippe)][BPh4] (R = H, Ph). X-Ray Crystal Structure of a Novel Dicationic Ruthenium Carbyne (Cp* = C5Me5; dippe = 1,2-bis(diisopropylphosphine)ethane) | Publicación