Amidoboranes of rubidium and caesium: the last missing members of the alkali metal amidoborane family

We report the synthesis and physicochemical characterization of two ammonia borane derivatives: rubidium amidoborane (RbNH BH ) and caesium amidoborane (CsNH BH ). Both compounds undergo solid-solid phase transition upon heating and then evolve pure hydrogen at temperatures lower than 125 °C. The ph...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2017, Vol.46 (46), p.16315-16320
Main Authors: Owarzany, Rafał, Jaroń, Tomasz, Leszczyński, Piotr J, Fijalkowski, Karol J, Grochala, Wojciech
Format: Article
Language:English
Subjects:
Alkali metals
Ammonia
Cesium
Crystal structure
Phase transitions
Raman spectra
Rubidium
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Summary:We report the synthesis and physicochemical characterization of two ammonia borane derivatives: rubidium amidoborane (RbNH BH ) and caesium amidoborane (CsNH BH ). 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.
ISSN:1477-9226
1477-9234
DOI:10.1039/c7dt03590j