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Issue 1, 1980
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Synthesis and reactions of binuclear molybdenocene and tungstenocene derivatives

Abstract

The tetramer [{Mo(η-C5H5)2HLi}4] reacts with N2O giving the yellow dimers cis- and trans-[{Mo(η-C5H5)H}2-(µ-σ : η-C5H4)2]. These thermally rearrange to the green dimer [{Mo(η-C5H5)H}2(µ-η5-C5H45-C5H4)]. Protonation of the latter gives [{Mo(η-C5H5)H}2(µ-H)(µ-η5-C5H45-C5H4)][PF6]. Photolysis of [Mo-(η-C5H5)2H2] or the yellow dimers gives a red dimer [{Mo(η-C5H5)}2(µ-σ : η5-C5H4)2]. Prolonged treatment of the four neutral dimers with aqueous acid gives [{Mo(η-C5H5)}2(µ-H)(µ-OH)(µ-η5-C5H45-C5H4)][PF6]2. The red and yellow dimers react with iodine giving [{Mo(η-C5H5)I}2(µ-σ : η5-C5H4)2] and the corresponding reaction with the green dimer yields [{Mo(η-C5H5)I}2(µ-η5-C5H45-C5H4)]. The red dimer also adds to methyl bromide giving [{Mo(η-C5H5)Me}{Mo(η-C5H5)Br}(µ-σ : η5-C5H4)2], whereas the yellow dimer reacts with methyl iodide to give [{Mo(η-C5H5)}2(µ-σ : η5-C5H4)2]. Photolysis of [W(η-C5H5)2H2] in diethyl ether gives cis- and trans-[{W(η-C5H5)H}2(µ-σ : η5-C5H4)2] and the cation [W(η-C5H5)2(η-C2H4)H]+. Thermal decomposition of [W(η-C5H5)2MeH] in cyclohexane gives isomers of the compound [{W(η-C5H5)2Me}{W(η-C5H5)H}-(µ-σ : η5-C5H4)2].

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Article type: Paper
DOI: 10.1039/DT9800000029
Citation: J. Chem. Soc., Dalton Trans., 1980,0, 29-40
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    Synthesis and reactions of binuclear molybdenocene and tungstenocene derivatives

    M. Berry, N. J. Cooper, M. L. H. Green and S. J. Simpson, J. Chem. Soc., Dalton Trans., 1980, 0, 29
    DOI: 10.1039/DT9800000029

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