Synthesis, Structure, and Electrochemical Properties of 2,3,4,5-Tetraphenyl-1-Monophosphaferrocene Derivatives.
Almaz A ZagidullinAlena R LakomkinaMikhail N KhrizanforovRobert R FayzullinKirill V KholinTatyana P GerasimovaRuslan P ShekurovIlya A BezkishkoVasili A MilyukovPublished in: Molecules (Basel, Switzerland) (2023)
Heteroleptic 2,3,4,5-tetraphenyl-1-monophosphaferrocene [FeCp(η 5 -PC 4 Ph 4 )] was obtained at a 62% yield through the reaction of lithium 2,3,4,5-tetraphenyl-1-monophosphacyclopentadienide Li(PC 4 Ph 4 ) ( 1 ) with [FeCp(η 6 -C 6 H 5 CH 3 )][PF 6 ]. The structure of 1-monophosphaferrocene 2 and its W(CO) 5 -complex 3 were confirmed by multinuclear NMR and single-crystal X-ray diffraction study and further supported by DFT calculations. Cyclic voltammetry demonstrated that [FeCp(η 5 -PC 4 Ph 4 )] 2 has a quasi-reversible oxidation wave. The comparison of the properties of phosphaferrocene 2 with those of W(CO) 5 -complex 3 shows the possibility of changing the coordination type during oxidation.