Hydrothermal Crystal Growth and Structure Determination of Double Hydroxides LiSb(OH)6, BaSn(OH)6, and SrSn(OH)6

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• 作者：Hiroshi Mizoguchi ; Nattamai S. P. Bhuvanesh ; Young-Il Kim ; Satoshi Ohara ; Patrick M. Woodward
• 刊名：Inorganic Chemistry
• 出版年：2014
• 出版时间：October 6, 2014
• 年：2014
• 卷：53
• 期：19
• 页码：10570-10577
• 全文大小：386K
• ISSN：1520-510X

文摘

Colorless single crystals of LiSb(OH)₆, SrSn(OH)₆, and BaSn(OH)₆, which are useful as precursors for the synthesis of LiSbO₃, SrSnO₃, and BaSnO₃, were synthesized by a low-temperature hydrothermal method using a Teflon-lined autoclave at 380 K. The crystal structures were determined by single-crystal X-ray diffraction measurements. LiSb(OH)₆ crystallizes in the trigonal space group P3虆1m with a = 5.3812(3)A, c = 9.8195(7)A, V = 246.25(3)A³, Z = 2. In this layered structure, [Li₂Sb(OH)₆]⁺ and [Sb(OH)₆]^{鈭?/sup> layers are alternately stacked along the c-direction. The [Li₂Sb(OH)₆]+ layer can be regarded as a cation-ordered CdCl₂ layer. The [Sb(OH)₆)]鈭?/sup> layer is built up from isolated [Sb(OH)₆]鈭?/sup> octahedra, which are linked to each other via hydrogen bonding within the layer. BaSn(OH)₆ and SrSn(OH)₆ crystallize with monoclinic P2₁/n space group symmetry. The monoclinic structure possesses a CsCl-type packing of Ba2+/Sr2+ cations and [Sn(OH)₆]2鈥?/sup> anions. The [Sn(OH)₆]2鈥?/sup> polyhedra are connected to each other through hydrogen bonding to form a three-dimensional framework. The factors that favor these hitherto unknown crystal structures are discussed using a structure map that compares various M(OH)₃ and M鈥睲鈥?OH)₆ compounds.}