Synthesis of Main-Group Polycations in Molten and Pseudo-Molten GaBr3 Mediaстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 10 октября 2019 г.
Аннотация:The prospects of synthesizing polycationic species using GaBr3 in benzene solution at room temperature have been investigated. The salts Bi8[GaBr4]2, Sb8[GaBr4]2 and Te4[Ga2Br7]2 have been isolated and characterized. The first two compounds are isotypic with Sb8[GaCl4]2, crystallize in the space group Pna21, and feature square anti‐prismatic E82+ polycations (E = Sb, Bi). Unit‐cell parameters for Bi8[GaBr4]2 are a = 18.3014(10) Å, b = 10.3391(6) Å and c = 13.5763(7) Å, and for Sb8[GaBr4]2; a = 18.096(2) Å, b = 10.1572(9) Å and c = 13.2168(10) Å. Te4[Ga2Br7]2 crystallizes in the space group P21/c with a = 10.1600(9) Å, b = 10.8314(9) Å, c = 13.8922(10) Å and β = 99.182(7)°, and features a square‐planar Te42+ polycation. The compound Bi5[GaBr4]3 has been synthesized from molten GaBr3 and characterized by using powder diffractometry in space group Fm‐3c; a = 17.6263(8) Å. The structure model for this compound suggests the included Bi53+ cations to be practically freely oriented within its cavities in the solid phase.