CRYSTAL STRUCTURE OF (Xe2F11+)(VF6-)
Primož Benkiè*, Ljubo Goliè**, Jože Koller**, Boris Žemva*
*Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia ** Faculty of Chemistry and Chemical Technology, University of Ljubljana, Aškerèeva 5, SI-1000 Ljubljana, Slovenia
Single crystal of (Xe2F11+)(VF6-) has been prepared. Compound crystallises in monoclinic space group P21/n (No.14) with a =8 55.1(1) pm, b = 889.6(1) pm, c = 1570.3(1) pm, b = 93.31(2)°, V = 1.1925(9) nm3, Z = 4 and rc = 3.545 Mg/m3. A structure determination using three-dimensional MoKa X-ray data resulted in conventional R and wR factors of 0.046 and 0.066 respectively, for 2217 unique reflections for which I ³ 3s(I). The structure shows two groups; the essentially octahedral VF6-anion and Xe2F11+cation, which consists of two XeF5 units bridged by additional common fluorine atom. Calculation of Mulliken charges for structural units Xe2F11VF6 and Xe2F11AuF6 has been performed.