Structural Organization and Thermal Behavior of Compounds Rb3(SbF3)(Zr2F11)·0.5H2O and Rb3(SbF3)(Zr2F11)

IF 1.8 3区 化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR Russian Journal of Inorganic Chemistry Pub Date : 2024-09-15 DOI:10.1134/s0036023624601648
A. V. Gerasimenko, T. F. Antokhina, N. N. Savchenko
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Abstract

Compound Rb3(SbF3)(Zr2F11)·0.5H2O and its dehydration product Rb3(SbF3)(Zr2F11) were synthesized and their structures were studied. It was found that compound Rb3(SbF3)(Zr2F11)·0.5H2O has a unique fluoride zirconate framework structure built of ring tetrameric fragments (Zr4F24) connected to each other at the vertices by bridging fluorine atoms. Inside the tetrameric fragments, ZrF8 polyhedra are connected to each other along common edges. The zirconium framework [Zr2F11]3– is bound by Zr–F–Sb fluoride bridges from the second coordination sphere of antimony atoms. The structure of the dehydrated compound Rb3(SbF3)(Zr2F11) is a three-dimensional framework consisting of infinite chains of composition [Zr2F11]3–. The chains are formed by ZrF7 polyhedra connected along edges and vertices and united with each other into a three-dimensional framework by fluoride bridges Zr–F–Sb from the second coordination sphere of antimony atoms. In Rb3(SbF3)(Zr2F11), in the temperature range 247–256 K, a reversible phase transition occurs from the partially disordered high-temperature phase α to the ordered low-temperature phase β. With the participation of fluorine atoms of the second coordination sphere and a lone pair of electrons around antimony atoms, coordination polyhedra are formed in the structures in the form of distorted (SbEF5) and single-capped (SbEF6) octahedra.

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Rb3(SbF3)(Zr2F11)-0.5H2O 和 Rb3(SbF3)(Zr2F11) 化合物的结构组织和热行为
摘要 合成了化合物Rb3(SbF3)(Zr2F11)-0.5H2O及其脱水产物Rb3(SbF3)(Zr2F11),并研究了它们的结构。研究发现,Rb3(SbF3)(Zr2F11)-0.5H2O 化合物具有独特的氟锆酸盐框架结构,该结构由环状四聚体片段 (Zr4F24) 构建而成,这些片段的顶点通过氟原子桥连接在一起。在四聚体片段内部,ZrF8 多面体沿着公共边缘相互连接。锆框架 [Zr2F11]3- 由来自锑原子第二配位层的 Zr-F-Sb 氟化桥结合。脱水化合物 Rb3(SbF3)(Zr2F11)的结构是由[Zr2F11]3-无限链组成的三维框架。这些链由沿边缘和顶点连接的 ZrF7 多面体组成,并通过来自锑原子第二配位层的氟桥 Zr-F-Sb 相互连接成一个三维框架。在 Rb3(SbF3)(Zr2F11)中,在 247-256 K 的温度范围内,会发生从部分无序的高温相 α 到有序的低温相 β 的可逆相变。由于第二配位层中氟原子的参与和锑原子周围孤对电子的存在,配位多面体以扭曲(SbEF5)和单帽(SbEF6)八面体的形式在结构中形成。
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来源期刊
Russian Journal of Inorganic Chemistry
Russian Journal of Inorganic Chemistry 化学-无机化学与核化学
CiteScore
3.10
自引率
38.10%
发文量
237
审稿时长
3 months
期刊介绍: Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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