实验室x射线粉末数据中的MYb(BH4)4 (M = K, Na)。

IF 0.8 4区化学

Acta crystallographica. Section C, Crystal structure communications Pub Date : 2013-11-01 Epub Date: 2013-10-19 DOI:10.1107/S0108270113027145

Wojciech Wegner, Tomasz Jaroń, Wojciech Grochala

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引用次数: 14

摘要

在固体条件下，通过机械化学反应合成了四硼氢化镱钾KYb(BH4)4和四硼氢化镱钠NaYb(BH4)4。这两种化合物都是同结构的，并且都以先前报道的NaSc(BH4)4和KY(BH4)4的结构在Cmcm空间基团中结晶。该晶体结构由M(+)阳离子(M = Na, K)包围的孤立的同色离子[Yb(BH4)4](-)阴离子组成。M(+)阳离子和[Yb(BH4)4](-)阴离子的堆积是六方NiAs结构类型的扭曲变形，M(+)形成扭曲的三角棱镜，即M6。每个第二棱柱围绕一个[Yb(BH4)4](-)阴离子，而[Yb(BH4)4](-)阴离子围绕M(+)阳离子排列成变形的八面体。

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MYb(BH4)4 (M = K, Na) from laboratory X-ray powder data.

Two new borohydrides, potassium ytterbium tetraborohydride, KYb(BH4)4, and sodium ytterbium tetraborohydride, NaYb(BH4)4, have been synthesized via mechanochemical reactions in the solid state. The two compounds are isostructural and both crystallize in the Cmcm space group in the structure reported previously for NaSc(BH4)4 and KY(BH4)4. This crystal structure is composed of isolated homoleptic [Yb(BH4)4](-) anions surrounded by M(+) cations (M = Na, K). The packing of the M(+) cations and [Yb(BH4)4](-) anions is a distorted variant of the hexagonal NiAs structure type, with M(+) forming distorted trigonal prisms, i.e. M6. Each second prism surrounds a [Yb(BH4)4](-) anion, while the [Yb(BH4)4](-) anions are arranged into deformed octahedra around the M(+) cations.

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来源期刊

Acta crystallographica. Section C, Crystal structure communications 化学-晶体学

自引率

12.50%

发文量

审稿时长

1 months

期刊介绍： Acta Crystallographica Section C: Structural Chemistry is continuing its transition to a journal that publishes exciting science with structural content, in particular, important results relating to the chemical sciences. Section C is the journal of choice for the rapid publication of articles that highlight interesting research facilitated by the determination, calculation or analysis of structures of any type, other than macromolecular structures. Articles that emphasize the science and the outcomes that were enabled by the study are particularly welcomed. Authors are encouraged to include mainstream science in their papers, thereby producing manuscripts that are substantial scientific well-rounded contributions that appeal to a broad community of readers and increase the profile of the authors.