Synthesis and crystal structure of new sodium oxothiocyanofluoroantimonate(III) Na2Sb5F9O3(NCS)2 |
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| Authors: | L A Zemnukhova A A Udovenko A E Panasenko V Ya Kavun G A Fedorishcheva |
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| Institution: | 1. Institute of Chemistry, Far East Branch, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia
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| Abstract: | Na2Sb5F9O3(NCS)2, a new complex, has been synthesized from NaSCN and SbF3 aqueous solutions and studied by chemical, X-ray diffraction, and thermal analyses and IR, 121,123Sb NQR, and 19F NMR spectroscopy. Its layered structure (triclinic symmetry system, a = 6.9998(1) Å, b = 9.4180(1) Å, c = 13.1094(2) Å, α = 74.815(1)°, β = 78.188(1)°, γ = 82.779(1)°, Z = 2, space group P $\bar 1$ ) is built of Na+ cations and Sb10F18O6(NCS)4]4? decanuclear complex anions that consist of two Sb5F9O3(NCS)2]2? pentanuclear complex anions linked by two weak Sb-F ionic bonds (2.529(2) Å). Decanuclear complex anions are linked into layers by secondary Sb…F bonds and Na-F bonds. Van der Waals interactions link these layers into a framework. The complex is stable up to 200°C. |
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