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Isolated cyclo-Tetraarsendiide Anions: Synthesis and Crystal Structures of Bis(tetraamminelithium) tetraarsenide [Li(NH3)4]2As4, Bis(pentaamminesodium) tetraarsenide – ammonia (1/3) [Na(NH3)5]2As4 · 3NH3 and Bis[(4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo [8.8.8]hexacosan)(cesium, rubidium)] tetraarsenide – ammonia (1/2) [Cs0.35Rb0.65(2,2,2-crypt)]2As4 · 2NH3

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Summary.

The ammoniates [Li(NH3)4]2As4, [Na(NH3)5]2As4 · 3NH3, and [Cs0.35Rb0.65(2,2,2-crypt)]2As4 · 2NH3 (2,2,2-crypt: 4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosan) were synthesised either by direct reduction of arsenic with Li(Ca)/Na in liquid ammonia or by reaction of Rb4As6 with CsPH2 in the same solvent. Single crystals were isolated and characterised by low temperature X-ray structure analysis. All three compounds contain As42− anions of almost square planar geometry which have no contacts to metal ions. The medium As–As bond length in the putatively aromatic anions is 2.362 Å.

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Authors and Affiliations

  1. Institut für Anorganische Chemie, Universität Regensburg, 93053, Regensburg, Germany

    Tobias Hanauer, Florian Kraus, Markus Reil & Nikolaus Korber

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  1. Tobias Hanauer
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  2. Florian Kraus
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  3. Markus Reil
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  4. Nikolaus Korber
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Correspondence to Nikolaus Korber.

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Hanauer, T., Kraus, F., Reil, M. et al. Isolated cyclo-Tetraarsendiide Anions: Synthesis and Crystal Structures of Bis(tetraamminelithium) tetraarsenide [Li(NH3)4]2As4, Bis(pentaamminesodium) tetraarsenide – ammonia (1/3) [Na(NH3)5]2As4 · 3NH3 and Bis[(4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo [8.8.8]hexacosan)(cesium, rubidium)] tetraarsenide – ammonia (1/2) [Cs0.35Rb0.65(2,2,2-crypt)]2As4 · 2NH3. Monatsh. Chem. 137, 147–156 (2006). https://doi.org/10.1007/s00706-005-0399-3

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  • DOI: https://doi.org/10.1007/s00706-005-0399-3

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