The dihydridocarbaferraborane [FeH2(2,3-Me2-2,3-C2B4H 4)2] reacts with [Co(PEt3)4], [Pt2(μ-cod)(PEt3)4] (cod = cyclo-octa-1,5-diene), and [Fe(cod)(η-C5H5)] to afford, respectively, the dimetallic species [CoFe( Me4C4B8H8)(PEt3) 2], [FePt(Me4C4B8H8) (PEt3)2], and [Fe2(Me4C4B8H8) (η-C5H5)], each of which features a metal-metal connectivity. An X-ray diffraction study of the iron-cobalt molecule shows that it belongs to the structural family involving two pentagonal bipyramids fused about a common iron apical vertex and sharing a double-capping BH function. Crystals are orthorhombic, space group P212121 with a = 16.533(5), b = 11.012(2), c = 16.279(3) Å, and four molecules per unit cell. Using 3 496 amplitudes recorded on a four-circle diffractometer at 291 ± 1 K the structure has been refined to R 0.043. The Co-Fe distance is 2.5300(8) Å; 0.05 Å longer than that in [CoFe(Me4C4B8H8) (η-C5H5)].
|Number of pages||8|
|Journal||Journal of the Chemical Society, Dalton Transactions|
|Publication status||Published - 1982|
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