Abstract

The structures of cesium and tetraphenylphosphonium polyborates obtained in the course of mild oxidation of the closo-decaborate anion [B₁₀H₁₀]^2– in water with a cerium(IV) salt to form Cs₂[trans-B₂₀H₁₈] as the main product and in the course of long-term isomerization of the [trans-B₂₀H₁₈]^2– anion under the action of UV irradiation to form (Ph₄P)₂[iso-B₂₀H₁₈] as the main product have been studied. The compounds have been isolated as solvates Cs[B₅O₆(OH)₄]·2H₂O and PPh₄[B₅O₆(OH)₄]·2DMF·H₂O from the filtrates obtained after removing the target compounds from the reaction solutions. The formation of polyborates is explained by the processes of degradation of boron cluster anions in reaction solutions over time.

中文翻译：

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近十硼酸阴离子二聚化和十八氢二十硼酸阴离子异构化过程中多硼酸盐的形成

摘要

铯和四苯基鏻多硼酸盐的结构是在水中用铈(IV)盐对近十硼酸阴离子[B ₁₀ H ₁₀ ] ^2-进行温和氧化形成Cs ₂ [反式-B ₂₀ H ₁₈ ] 的过程中得到的主要产物[ trans -B ₂₀ H ₁₈ ] ^2–阴离子在紫外光照射下长期异构化形成(Ph ₄ P) ₂ [ iso -B ₂₀ H ₁₈]作为主要产品进行了研究。从去除目标化合物后得到的滤液中分离出溶剂化物Cs[B ₅ O ₆ (OH) ₄ ]·2H ₂ O和PPh ₄ [B ₅ O ₆ (OH) ₄ ]·2DMF·H ₂ O从反应溶液中。多硼酸盐的形成可以通过反应溶液中硼簇阴离子随时间的降解过程来解释。