Acta Crystallographica Section C

Crystal Structure Communications

Volume 63, Part 10 (October 2007)

metal-organic compounds

gg3119 scheme

Acta Cryst. (2007). C63, m440-m444 [ doi:10.1107/S0108270107040449 ]

Hydrated hexacyanometallate(III) salts of triaqua(18-crown-6)lanthanoid(III) and tetraaqua(18-crown-6)lanthanoid(III) cations containing nine- and ten-coordinate lanthanoids

P. Misra, R. Koner, M. Nayak, S. Mohanta, J. N. Low, G. Ferguson and C. Glidewell

Abstract: Tetraaqua(18-crown-6)cerium(III) hexacyanoferrate(III) dihydrate, [Ce(C₁₂H₂₄O₆)(H₂O)₄][Fe(CN)₆]·2H₂O, and tetraaqua(18-crown-6)neodymium(III) hexacyanoferrate(III) dihydrate, [Nd(C₁₂H₂₄O₆)(H₂O)₄][Fe(CN)₆]·2H₂O, are isomorphous and isostructural in the C2/c space group, where the cations, which contain ten-coordinate lanthanoid centres, lie across twofold rotation axes and the anions lie across inversion centres. In these compounds, an extensive series of O-HO and O-HN hydrogen bonds links the components into a continuous three-dimensional framework. Triaqua(18-crown-6)lanthanoid(III) hexacyanoferrate(III) dihydrate, [Ln(C₁₂H₂₄O₆)(H₂O)₃][Fe(CN)₆]·2H₂O, where Ln = Sm, Eu, Gd or Tb, are all isomorphous and isostructural in the P $\overline{1}$ space group, as are triaqua(18-crown-6)gadolinium(III) hexacyanochromate(III) dihydrate, [Gd(C₁₂H₂₄O₆)(H₂O)₃][Cr(CN)₆]·2H₂O, and triaqua(18-crown-6)gadolinium(III) hexacyanocobaltate(III) dihydrate, [Gd(C₁₂H₂₄O₆)(H₂O)₃][Co(CN)₆]·2H₂O. In these compounds, there are two independent anions, both lying across inversion centres, and the lanthanoid centres exhibit nine-coordination; in the crystal structures, an extensive series of hydrogen bonds links the components into a three-dimensional framework.

Formula: [Ce(C₁₂H₂₄O₆)(H₂O)₄][Fe(CN)₆]·2H₂O, [Nd(C₁₂H₂₄O₆)(H₂O)₄][Fe(CN)₆]·2H₂O, [Sm(C₁₂H₂₄O₆)(H₂O)₃][Fe(CN)₆]·2H₂O, [Eu(C₁₂H₂₄O₆)(H₂O)₃][Fe(CN)₆]·2H₂O, [Gd(C₁₂H₂₄O₆)(H₂O)₃][Cr(CN)₆]·2H₂O and [Gd(C₁₂H₂₄O₆)(H₂O)₃][Co(CN)₆]·2H₂O


	Structure factor file (CIF format) (166.1 kbytes) [ doi:10.1107/S0108270107040449/gg3119Isup2.hkl ] Contains datablock I

	Structure factor file (CIF format) (164.9 kbytes) [ doi:10.1107/S0108270107040449/gg3119IIsup3.hkl ] Contains datablock II

	Structure factor file (CIF format) (314.2 kbytes) [ doi:10.1107/S0108270107040449/gg3119IVsup5.hkl ] Contains datablock IV

	Structure factor file (CIF format) (325.3 kbytes) [ doi:10.1107/S0108270107040449/gg3119Vsup6.hkl ] Contains datablock V

	Structure factor file (CIF format) (315.8 kbytes) [ doi:10.1107/S0108270107040449/gg3119IIIsup4.hkl ] Contains datablock III

	Structure factor file (CIF format) (310.7 kbytes) [ doi:10.1107/S0108270107040449/gg3119VIIsup7.hkl ] Contains datablock VII

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