Metal K-edge extended X-ray absorption fine structure studies of MoF6, RuF6, RhF6 and related fluoroanions

Abstract

Metal K-edge extended X-ray absorption fine structure data obtained for MoF₆, RuF₆ and RhF₆ as solids at 10 K have been refined to give d(M–F)= 1.81 (Mo), 1.83 (Ru) and 1.84 Å(Rh). Corresponding values for the powdered fluoroanions at room temperature are ca. 1.85 Å for K[MF₆](M = Ru or Rh) and 1.90–1.93 Å for K₂[MF₆](M = Ru, Rh or Pd). The value of d(Rh–Cl) in Cs₂[RhCl₆] is 2.31 Å. The results are compared with previous data on the 5d analogues and with X-ray crystallographic data.