The Crystal Structures of Rubidium and 4-Amino-1,2,4-Triazolium Tetrafluoroantimonates(III)

The crystal structures of complex antimony(III) fluorides RbSbF4 (I) and (C2N4H5)SbF4 (II) were determined. The crystals of I and II are monoclinic; for I: a = 4.628(1) Å, b = 6.167(1) Å, c = 7.922(1) Å, β = 100.582(3)°, V = 222.24(7) Å3, Z = 2, ρ(calcd.) = 4.23 g/cm3, ρ(exp.) = 4.25 g/cm3, F(000) = 248, space group P21/m, R = 0.0395; for II: a = 4.678(1) Å, b = 7.339(4) Å, c = 10.185(1) Å, β = 90.88(2)°, V = 349.6(2) Å3, Z = 2, ρ(calcd.) = 2.69 g/cm3, ρ(exp.) = 2.70 g/cm3, F(000) = 264, space group P21. The structure of I is formed by Rb+ cations and [SbF4]n−n anionic chains composed of SbF5E octahedra with two bridging fluorine atoms. The structure of IIis formed by (C2N4H5)+ cations and isolated [SbF4]− anions in which the antimony polyhedra are SbF4E trigonal bipyramids. The relationship between the crystal structures and electrophysical and biological properties of single-charged cation tetrafluoroantimonates(III) was studied.