Diguanidinium hexafluoridogermanate(IV) – an organic–inorganic hybrid salt with an antifluorite topology

Zeitschrift für Naturforschung B Pub Date : 2024-02-26 DOI:10.1515/znb-2024-0007

Jutta Kösters, David Böhnisch, Thomas Jüstel, Rainer Pöttgen

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Abstract

Polycrystalline diguanidinium hexafluoridogermanate (IV) was obtained by co-precipitation from solutions of diguanidinium carbonate and germanium dioxide in 48 % hydrogen fluoride. The [C(NH2)3]2[GeF6] structure was refined from single crystal X-ray diffractometer data: [C(NH2)3]2[TiF6] type, C2/m, a = 1276.67(8), b = 732.70(5), c = 616.37(5) pm, b = 114.497(5)°, wR = 0.0700, 1033 F 2 values, 53 variables. The trigonal planar [C(NH2)3]+ cations and the octahedral [GeF6]2− anions are condensed to double layers through strong H⋯F hydrogen bonds (208–213 pm H⋯F). The centers of gravity of the two building units have an antifluorite-like topology.

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六氟锗酸二胍(IV)--具有反氟石拓扑结构的有机-无机杂化盐

通过碳酸二胍和二氧化锗溶液在 48% 氟化氢中的共沉淀，获得了多晶六氟化锗酸二胍 (IV)。[C(NH2)3]2[GeF6]的结构是根据单晶 X 射线衍射仪数据提炼出来的：[C(NH2)3]2[TiF6]型，C2/m，a = 1276.67(8)，b = 732.70(5)，c = 616.37(5) pm，b = 114.497(5)°，wR = 0.0700，1033 F 2 值，53 个变量。三方平面[C(NH2)3]+阳离子和八面体[GeF6]2-阴离子通过强 H⋯F 氢键（208-213 pm H⋯F）凝聚成双层。两个构建单元的重心具有类似反萤石的拓扑结构。

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Zeitschrift für Naturforschung B

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