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Structure of a catalytically active oxo-centered trinuclear cobalt complex triaqua-(μ3-oxo)-hexa(μ2-pivalato-O,O′)-tricobalt(III)

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Abstract

The structure of a catalytically active oxo-centered trinuclear cobalt complex, namely, [triaqua-(μ3-oxo)-hexa(μ2-pivalato-O,O′)-tricobalt(III)]1+ · NO −3 · 3H2O, has been determined using X-ray diffraction analysis. The compound crystallizes in the hexagonal crystal system, space group of symmetry P63/mmc, with the unit cell parameters a = 12.328(1) Å, c = 22.625(1) Å, V = 2978.1(4) Å3, Z = 2, and ρ = 1.075 g/cm3. The final discrepancy factor is R1 = 0.0596 for 589 symmetrically nonequivalent reflections with I ⩾ 2σ(I), wR2 = 0.1612, and GooF = 1.035. The high-symmetry complex [C30H60O16Co3]1+ with symmetry D 6h and a diameter of ∼11 Å is an oxo-centered trinuclear cluster consisting of three symmetrically equivalent Co(III) atoms. Among the oxo-centered trinuclear metal complexes known to date, this complex has the highest symmetry and differs by the presence of two chemically equivalent bridges between the metal atoms. Apart from the two positively charged symmetrically equivalent trinuclear complexes, the unit cell contains two symmetrically equivalent NO −3 ions (statistically disordered over four positions) and six crystal water molecules.

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  1. Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences, nab. Makarova 2, St. Petersburg, 199034, Russia

    A. E. Lapshin & O. V. Magdysyuk

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  1. A. E. Lapshin
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  2. O. V. Magdysyuk
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Correspondence to A. E. Lapshin.

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Original Russian Text © A.E. Lapshin, O.V. Magdysyuk, 2010, published in Fizika i Khimiya Stekla.

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Lapshin, A.E., Magdysyuk, O.V. Structure of a catalytically active oxo-centered trinuclear cobalt complex triaqua-(μ3-oxo)-hexa(μ2-pivalato-O,O′)-tricobalt(III). Glass Phys Chem 36, 70–74 (2010). https://doi.org/10.1134/S1087659610010128

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