Hanauer, Tobias and Kraus, Florian and Reil, Markus and Korber, Nikolaus (2006) Isolated cyclo-tetraarsendiide anions: Synthesis and crystal structures of bis(tetraamminelithium) tetraarsenide [Li(NH3)(4)](2)As-4, bis(pentaamminesodium) tetraarsenide-ammonia (1/3) [Na(NH3)(5)](2)As-4 center dot 3NH(3) 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)](2)As-4 center dot 2NH(3). MONATSHEFTE FUR CHEMIE, 137 (2). pp. 147-156. ISSN 0026-9247, 1434-4475
Full text not available from this repository. (Request a copy)Abstract
The ammoniates [Li(NH3)(4)](2)As-4, [Na(NH3)(5)](2)As-4 center dot 3NH(3), and [Cs0.35Rb0.65(2,2,2-crypt)](2)As-4 center dot 2NH(3) (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 As-4(2-) 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 angstrom.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | VIBRATIONAL-SPECTRA; ZINTL ANION; ION; COMPLEX; SALTS; ammoniates; arsenic; crystal structure; liquid ammonia |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Nikolaus Korber |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 24 Feb 2021 10:03 |
| Last Modified: | 24 Feb 2021 10:03 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35011 |
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