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Hexamagnesium dicobalt undecadeuteride Mg6Co2D11: containing [CoD4]5− and [CoD5]4− complex anions conforming to the 18-electron rule

Authors
Fischer, P.
Zolliker, P.
Cox, D.E.
Hewat, A.
Published in Journal of Alloys and Compounds. 1992, vol. 187, no. 1, p. 233-241
Abstract Mg6Co2D11 crystallizes in space group Pnma, a=8.1000(2)Å, b=10.0643(2)Å, c = 18.5664(4)Å, V = 1513Å3, Z = 8. The partly disordered structure contains 14 symmetry-independent deuterium atoms, of which 9 are coordinated to cobalt in square-pyramidal [CoD5]4− and saddle-like [CoD4]5− complex anions, and 5 are bonded to magnesium only. The Co-D bond distances range between 1.52(1) Å and 1.62(2) Å. The limiting ionic formula can be written as 4Mg6Co2D11=5MgD219Mg2+2[CoD5]4−6[CoD4]5−. The 63-parameter structure was solved ab initio and refined from joint synchrotron and neutron high resolution powder diffraction data.
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CERNY, Radovan et al. Hexamagnesium dicobalt undecadeuteride Mg6Co2D11: containing [CoD4]5− and [CoD5]4− complex anions conforming to the 18-electron rule. In: Journal of Alloys and Compounds, 1992, vol. 187, n° 1, p. 233-241. https://archive-ouverte.unige.ch/unige:99698

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Deposited on : 2017-11-27

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