Cs2Ba(O3)4 · 2 NH3, das erste ionische Erdalkaliozonid |
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Authors: | Wilhelm Klein Martin Jansen |
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Abstract: | Cs2Ba(O3)4 · 2 NH3, the First Ionic Alkaline Earth Metal Ozonide Cs2Ba(O3)4 · 2 NH3 is the first ionic ozonide containing an alkaline earth metal cation. Its synthesis has been achieved via partial cation exchange of CsO3 dissolved in liquid ammonia. According to a single crystal X‐ray structure determination (Pnnm; a = 6.312(2) Å, b = 12.975(3) Å, c = 8.045(2) Å; Z = 2; R1 = 4.6%; 848 independent reflections) ozonide anions, cesium cations and ammonia molecules form a CsCl‐type arrangement, where Cs+ and NH3 occupy one half of the cation sites, each. Ba2+ is coordinated by four ozonide groups and two ammonia molecules. Because of a short hydrogen bond to one of the terminal oxygen atoms, the respective O–O‐distance in the ozonide ion is longer than the other. The shortest intermolecular O–O‐distance ever observed in ionic ozonides has been found in this compound, which can be taken as a first clue for the radical ozonide anion to dimerize like the isoelectronic SO2– does. |
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Keywords: | Ozonides Barium Cesium Barium Ozonide Crystal structure |
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