摘要:
                                Cyclic voltammetric investigations reveal that [Mo(C=CFc)(dppe)(eta-C7H7)] (dppe = Ph2PCH2CH2PPh2) 1a, undergoes two reversible one-electron oxidations; chemical oxidation with [FeCp2][PF6] results in the formation of [Mo(C=CFc)(dppe)(eta-C7H7)][PF6] 1b, accompanied by a negative shift in the infrared active nu(C=C) of 50 cm(-1). The solution esr spectrum of 1b, with resolved hyperfine coupling to dppe phosphorus atoms and C7H7 ring hydrogens, suggests that the odd electron in 1b is resident principally at the cycloheptatrienylmolybdenum centre. (C) 1997 Elsevier Science S.A.