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6650457 
Journal Article 
THE CRYSTAL-STRUCTURE OF (AG(XEF2)2) ASF6 FORMED IN THE OXIDATION OF XE BY AGFASF6 
Hagiwara, R; Hollander, F; Maines, C; Bartlett, N; , 
1991 
Yes 
European Journal of Solid State and Inorganic Chemistry
ISSN: 0992-4361 
GAUTHIER-VILLARS 
PARIS 
855-866 
WOS:A1991GE12300009 
[Ag(XeF2)2]AsF6 is formed by the interaction of Xe with a solution of AgFAsF6 in anhydrous hydrogen fluoride(AHF) at 20-degrees-C. It may also be made from AgAsF6 and excess XeF2 in anhydrous HF. It crystallizes in space group I4c2BAR with a0 = 8.4558(12) angstrom, c0 = 12.8645(19) angstrom, V = 919.8(3) angstrom3 at -118-degrees-C, Z = 4. The structure was solved by the Patterson method and refined to conventional R and wR values of 0.0189 and 0.0253, respectively. Sheets of the NaCl type arrangement of AgAsF6 occur in the structure. The XeF2 molecules are located between those sheets, each being coordinated to two Ag+, one in the sheet above, the other below. Each Ag+ is at the center of a roughly cubic arrangement of F ligands in two four fold rectangular planar sets mutually at right angles. The closely coordinated set involves F ligands of the XeF2 with Ag...F = 2.466(3) angstrom. The four more distant F are ligands of the AsF6- with Ag...F = 2.732(3) angstrom. The XeF2 and the AsF6- are approximately D infinityh and O(h) respectively with the bond lengths of Xe-F = 1.979(3) angstrom, As-F(axial) = 1.718(3) angstrom and As-F (equatorial) = 1.712(3) angstrom. The compound slowly loses its XeF2 in a vacuum at room temperature and falls to AgAsF6.