Sulfur heterocubanes

Organometallic derivatives of the less electron rich transition metals have been used by several investigators as precursors to polynuclear complexes. Cp-substi-tuted transition metal halides, for example, have been allowed to react with M2E, (M = Li, Na E = S, Se x = 1,2) or elemental sulfur or selenium. [251-254] S(SiMe3)2 and Se(SiMe3)2 have also been used successfully. Thus, the reaction of [CpCrCl2(P Bu3)] with Se(SiMc3)2 furnishes the heterocubane cluster [Cp4Cr4Se4]. [255]... 

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