Alkaline earth metal poly(hydrogen fluorides) hexafluoroarsenates(V) and hexafluorophosphate(V): M2(H2F3)(HF2)2(AF6) (M=Ca, A=As; M=Sr, A=As, P)

HF molecules and poly(hydrogen fluoride) anions as ligands to metal centers

“…The compounds of the type M 2 (H 2 F 3 )(HF 2 ) 2 (AF 6 ) (M = Ca, A = As; M = Sr, A = As, P) [28] represent the first known examples of the compounds with H 2 F 3 À and HF 2 À anions in the molecule. They can be prepared by the reaction of MF 2 and M(AsF 6 ) 2 in the mole ratio 3:1 in HF (Ca compound) or by the reaction of MF 2 and AsF 5 in the mole ratio 2:1 in HF (Ca, Sr compounds).…”