Sr(ReO4)Br⋅2H2O and Ba(ReO4)I⋅2H2O: New Representatives of the Ca(ReO4)Cl⋅2H2O Type Structure

Авторы: Charkin D.O., Khasanov K.A., Kireev V.E., Grishaev V.Yu, Eremina T.A., Siidra O.I., Aksenov S.M.
Журнал: Journal of Chemical Crystallography
Год издания: 2026
Издательство: Springer Nature
Местоположение издательства: Switzerland
Первая страница: 29
Номер статьи: 56
DOI: 10.1007/s10870-026-01088-3
Аннотация: Crystals of two new alkaline-earth perrhenate halides, Sr(ReO4)Br⋅2H2O (1) and Ba(ReO4)I⋅2H2O (2) were obtained upon evaporation of aqueous solutions at 95 – 100 °C. Both compounds are isostructural to the previously reported Ca(ReO4)Cl⋅2H2O and crystallize in orthorhombic symmetry with the space group Cmcm (a = 7.3906(5) Å, b = 14.241(1) Å, c = 7.1032(5) Å for 1 and a = 7.8624(4) Å, b = 14.0202(5) Å, c = 7.7190(3) Å for 2). Both structures can be regarded as pseudo-layered 3D frameworks comprised of AO8X capped square antiprisms (A = Sr, Ba; X = Br, I) and ReO4 tetrahedra which share vertices with formation of slightly distorted tetragonal pseudo-layers linked by OH⋅⋅⋅X hydrogen bonds. The cationic centers (alkaline earths and rhenium) adopt a litharge-like arrangement. The structure seems to be very sensitive to the ratio of A2+ and X− constituents; it is as yet observed with calcium, only as a chloride, with strontium, only as a bromide, and with barium, only as an iodide.
Добавил в систему: Еремин Николай Николаевич

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