We report the synthesis and physicochemical characterization of two ammonia borane derivatives: rubidium amidoborane (RbNH₂BH₃) and caesium amidoborane (CsNH₂BH₃). Both compounds undergo solid–solid phase transition upon heating and then evolve pure hydrogen at temperatures lower than 125 °C. The phase transition is clearly seen in the Raman spectra. We present crystal structures of both low- and high-temperature forms of the title compounds which were solved from powder X-ray data.

中文翻译：

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id和铯的氨基硼烷：碱金属氨基硼烷族的最后缺失成员

我们报告了两种氨硼烷衍生物：and硼烷character（RbNH ₂ BH ₃）和am硼烷铯（CsNH ₂ BH ₃）的合成和理化特性。两种化合物在加热时都会经历固-固相变，然后在低于125°C的温度下释放出纯氢。在拉曼光谱中可以清楚地看到相变。我们介绍了低温和高温形式的标题化合物的晶体结构，这些结构是根据粉末X射线数据解决的。