Diferrocenyl mercury

C5H5 C5H5 mw 370.14, Fe 30.18 orn crysts (from ale), mp - darkens at 205° melts with deconipn at 230° readily sol in benz mod sol in petr eth, toluene, dioxane, tetrahydrofuran 8r ale was formed by the decompn of diferrocenyl mercury, (C HjFeC H Hg, in the presence of Pd black (Refs)... 

The oldest [10] and most extensively studied diferrocenyl metal compound is the orange mercury derivative, HgFc2 (Fig. 5-7), which is obtained readily from chloromercuriferrocene , Fc-HgCl, with various reductive agents such as, for example, aq. Na2S203 solution [10,156], Na dispersion in nonane/benzene, Nal in ethanol or SnCl2 2 H2O in aq. NaOH [12], [RefCO) ] in THF solution [157], and cystein in DMF/H2O at pH 7 [158],... 

The X-ray structure analysis of the monohydrate, HgFc2 H2O, has confirmed that the cyclopentadienyl rings in the ferrocenyl substituents possess an eclipsed conformation [158]. The mercurial HgFcj can be used as ferrocenyl transfer reagent thus, rare-earth dihalides react with HgFc2 to give new diferrocenyl metal compounds such as YbFcj [159, 160], SmFcj and EuFc2 [160]. 

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