Some studies of η-cycloheptatrienylmolybdenum compounds

Abstract

The cation [Mo(η-C₇H₇)(η-C₆H₅R)]⁺ readily undergoes displacement of the arene ligand allowing the following compounds to be prepared: [Mo(η-C₇H₇)L₃][PF₆][L₃=(MeCN)₃, (MeCN)₂(PPh₃), (MeCN)(Ph₂PCH₂CH₂PPh₂), (PMe₂Ph)₃, (PMePh₂)₃, or (CO)(PMe₂Ph)₂]; [(η-C₇H₇)Mo(µ-X)₃Mo(η-C₇H₇)]A (X = Cl, Br, OMe, or OEt; A = PF₆, or BF₄); and [(η-C₇H₇)Mo(µ-X)₃Mo(η-C₇H₇)](X = Cl, Br, I, or OMe). The last neutral compounds are paramagnetic, and electronic, e.s.r., i.r., and photolectron spectral studies have been made. The new compounds K₂[Mo(η-C₇H₇)(CN)₃], [Mo(η⁵-C₆H₇)(η-C₇H₇)], [Mo(η-C₇H₇)(PPh₃)(pd)](pd = pentane-2.4- dionate), and [Mo(η-C₃H₅)(η-C₇H₇)(PPh₃)] are also described.