Coordination studies of 1,2-bis(diphenylphosphino)ethane with di-μ-hydroxo dinuclear complexes of tungsten(IV) and molybdenum(IV)

Makoto Minato, Takashi Ito, Jian-Guo Ren


The new trifluoroethoxo phosphine complexes [Cp2M(η1-dppe)(CF3CH2O)]+ and [Cp2(CF3CH2O)M(μ-dppe)MCp2(CF3CH2O)]2+ ( M = Mo or W, Cp = η-C5H5 and dppe = Ph2PCH2CH2PPh2) have been prepared by reaction of cationic di-μ-hydroxo dinuclear complex of molybdenocene or tungstenocene [Cp2M(μ-OH)2MCp2]2+ with dppe.  It was ascertained that the amount of dppe added to the reaction mixture could influence the product distribution.  A mechanism involving initial replacement of the hydroxo ligand by the alkoxo group followed by nucleophilic attack of the phosphine is proposed on the basis of the reaction profile.


molybdenocene; tungstenocene; dinuclear complexes; dppe

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