Ba(SbF₆)₂·5XeF₂：首个含钡的二价氙化合物。合成、振动光谱及晶体结构

Ba(SbF(6))(2).5XeF(2): first xenon(II) compound with barium. Synthesis, vibrational spectra, and crystal structure.

作者信息

Turicnik Alenka, Benkic Primoz, Zemva Boris

机构信息

Department of Inorganic Chemistry and Technology, Jozef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia.

出版信息

Inorg Chem. 2002 Oct 21;41(21):5521-4. doi: 10.1021/ic025670f.

DOI:10.1021/ic025670f

PMID:12377048

Abstract

The reaction between Ba(SbF(6))(2) and excess XeF(2) in anhydrous HF at room temperature yields the white solid Ba(SbF(6))(2).5XeF(2) after the excess XeF(2) and the solvent have been removed under vacuum. Ba(SbF(6))(2).5XeF(2) crystallizes in the monoclinic space group C2/m, with a = 13.599(6) A, b = 12.086(4) A, c = 9.732(5) A, beta = 134.305(6) degrees, V = 1144.7 (8) A(3), and Z = 2. The coordination sphere of each barium atom consists of 12 fluorine atoms. The structure consists of alternating layers of Ba(SbF(6))(2).XeF(2) and 4 XeF(2) molecules. The Ba atoms in the Ba(SbF(6))(2).XeF(2) layer are in a nearly rhombic-net array and are linked with trans F-bridging ligands of SbF(6)(-). A XeF(2) molecule is placed in the center of each rhombus of the Ba(2+) array so that its symmetry axis is perpendicular to the plane of the Ba(SbF(6))(2).XeF(2) layer. This layer is linked to its neighbors by a layer of centrosymmetric XeF(2) molecules. Raman spectra are in accord with all XeF(2) molecules being symmetrical.

摘要

在室温下，Ba(SbF₆)₂与过量的XeF₂在无水HF中反应，在真空除去过量的XeF₂和溶剂后，生成白色固体Ba(SbF₆)₂·5XeF₂。Ba(SbF₆)₂·5XeF₂以单斜空间群C2/m结晶，a = 13.599(6) Å，b = 12.086(4) Å，c = 9.732(5) Å，β = 134.305(6)°，V = 1144.7 (8) Å³，Z = 2。每个钡原子的配位球由12个氟原子组成。该结构由Ba(SbF₆)₂·XeF₂层和4个XeF₂分子交替层组成。Ba(SbF₆)₂·XeF₂层中的Ba原子呈近菱形网状排列，并与SbF₆⁻的反式F桥连配体相连。一个XeF₂分子位于Ba²⁺阵列每个菱形的中心，使其对称轴垂直于Ba(SbF₆)₂·XeF₂层的平面。该层通过一层中心对称的XeF₂分子与其相邻层相连。拉曼光谱表明所有XeF₂分子都是对称的。