Doubly silyl-bridged cyclopentadienyl anion (L2–), chromium(II) chloride and cyclopentadienyl anion (Cp–) react to give the dinuclear chromocene CpCrLCrCp with a metal–metal distance of 5.831(1)Å(X-ray determination) that has magnetically probably isolated chromocene moieties (NMR, magnetic susceptibility) but which show interactions in cyclic voltammetry.
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Atzkern et al. (1991) studied this question.
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