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.