Lorenz, Corinna and Gaertner, Stefanie and Korber, Nikolaus (2017) Si-4(4-) in Solution - First Solvate Crystal Structure of the Ligand-free Tetrasilicide Tetraanion in Rb1.2K2.8Si4 center dot 7NH(3). ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE, 643 (2). pp. 141-145. ISSN 0044-2313, 1521-3749
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We report the first solvate structure of the silicide anion Si-4(4-), which provides circumstantial evidence of the stability of the highly charged anion in liquid ammonia solutions. The solvate Rb(1.2)K(2.8)Si(4)7NH(3) crystallized from a mixture of the ternary compound K6Rb6Si17 with the transition metal complex [(C6H5)(3)P](2)Ni(CO)(2) [bis(triphenylphosphine)dicarbonylnickel] in the presence of the chelating agents 18-crown-6 (1,4,7,10,13,16-hexaoxacyclooctadecane) and [2.2.2]cryptand (4,7,13,16,21,24-hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane) in liquid ammonia. Single X-ray diffraction analysis confirms the presence of the Si-4(4-) anion in the crystal structure of Rb(1.2)K(2.8)Si(4)7NH(3), which represents the first solvate compound of the naked tetrasilicide tetraanion. All five crystallographically independent cation positions show mixed occupancy by Rb+ and K+.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ALKALIMETALLE ZU HALBMETALLEN; QUANTUM-MECHANICAL CALCULATIONS; LIQUID-AMMONIA; ZINTL CLUSTERS; DAS VERHALTEN; SOLUTION CHEMISTRY; ELEMENTS; ANIONS; REFINEMENT; RB; Silicon; X-ray diffration; Zintl anions; Liquid ammonia |
| Subjects: | 500 Science > 540 Chemistry & allied sciences |
| Divisions: | Chemistry and Pharmacy > Institut für Anorganische Chemie > Arbeitskreis Prof. Dr. Nikolaus Korber |
| Depositing User: | Unnamed user with email gd@ur.de |
| Date Deposited: | 14 Dec 2018 12:58 |
| Last Modified: | 06 Feb 2019 12:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/97 |
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