...
首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >TRIBARIUM TETRAHEDRO-TETRAGERMANIDE ACETYLENIDE, BA-3GE-4C-2 - SYNTHESIS, STRUCTURE, AND PROPERTIES
【24h】

TRIBARIUM TETRAHEDRO-TETRAGERMANIDE ACETYLENIDE, BA-3GE-4C-2 - SYNTHESIS, STRUCTURE, AND PROPERTIES

机译:TRIBARIUM TETRAHEDRO-TETRAGERMANIDE ACETYNIDE, BA-3GE-4C-2 - 合成、结构和性质

获取原文
获取原文并翻译 | 示例
           

摘要

Ba3Ge4C2 is formed at 1530 K from the elements or by reaction of BaC2 with BaGe2 (corundum crucible; steel ampoule). The compound is a semiconductor (grey colour; E-g = 1.1eV), brittle, very sensitive to moisture, and reacts with NH4Cl at about 400 K forming acetylene and germanes up to Ge4Hn. The new Ba3Ge4C2 structure type (space group I4/mcm, No.140; a=8.840(1) Angstrom, c=12.466(1) Angstrom; Z=4, Pearson code tI36), contains two kinds of isolated polyanions, namely tetrahedro-tetragermanide Ge-4(4-) and acetylenide C-2(2-) anions. The bond lengths are d(Ge-Ge) = 2.517 Angstrom (4x) and 2.641 Angstrom (2x), and d(C=C)=1.20 Angstrom. The Ba-3Ge-4C-2 structure is a hierarchical derivative of the perovskite (CaTiO3) generated by a partial atom/cluster replacement (Ge-4 for Ca, C-2 for Ti and Ba for 0). The Raman spectrum shows bands at 168, 199 and 280 cm(-1), and at 1796 cm(-1) characteristic for Ge-4(4-) andC-2(2-) Polyanions, respectively. References: 27
机译:Ba3Ge4C2 由元素在 1530 K 下或通过 BaC2 与 BaGe2 反应形成2 (刚玉坩埚;钢安瓿)。该化合物是半导体(灰色;E-g = 1.1eV),脆性,对水分非常敏感,在约400 K时与NH4Cl反应,形成乙炔和锗,最高可达Ge4Hn。新的Ba3Ge4C2结构类型(空间群I4/mcm,No.140;a=8.840(1)埃,c=12.466(1)埃;Z=4,皮尔逊代号tI36),含有两种分离的聚阴离子,即四面体-四锗[Ge-4](4-)和乙炔[C-2](2-)阴离子。键长为 d(Ge-Ge) = 2.517 埃 (4x) 和 2.641 埃 (2x),d(C=C)=1.20 埃。Ba-3[Ge-4][C-2]结构是由部分原子/团簇置换([Ge-4]为Ca,[C-2]为Ti,Ba为0)生成的钙钛矿(Ca-3)的分层衍生物。拉曼光谱分别显示了 [Ge-4](4-) 和 [C-2](2-) 聚阴离子在 168、199 和 280 cm(-1) 和 1796 cm(-1) 处的特征。[参考资料: 27]

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号