X-ray single crystal structure and vibrational spectra of AgBF4

The structure of AgBF4 has been determined from single-crystal X-ray diffraction data collected at 200 K and refined to a conventional R=0.0259 (wR=0.0276) from 338 independent reflections (35 parameters). This compound crystallizes in the orthorhombic system, space group Pnma (No. 62) with a=8.089(8)Å, b=5.312(6)Å, c=6.752(9)Å, V=290.1(10)Å3, and Z=4. The Ag+ ion is coordinated by ten F atoms at 2.561(4)-2.950(2) Å distances. The metal polyhedron shares edges with three and apexes with four BF4 tetrahedral units. [BF4]− anions deviate from ideal tetrahedral symmetry. The reduced symmetry can be seen in Raman spectrum, where splitting of the anion vibrational modes can be observed. Synthesis of the XeF2 complex salt of AgBF4 at ambient temperature failed.