Ba₃[Sn(OH)₆][SeO₄]₂·3H₂O, a hydrated 1:2 double salt of barium hexa-hydroxidostannate(IV) and barium selenate(VI).

ABSTRACT: Single crystals of tribarium hexa-hydroxidostannate(IV) bis-[selenate(VI)] trihydrate, Ba₃H₁₂O₁₇Se₂Sn or Ba₃[Sn(OH)₆][SeO₄]₂·3H₂O, prepared from solid BaSnO₃ and aqueous Na₂[SeO₄] solutions have hexa-gonal (P6₃) symmetry. The structure consists of four different primary building units: a hexa-hydroxidostannate(IV) ion, two different selenate(VI) ions, all three of point group symmetry C ₃, and a mono-capped {BaO₉}-square anti-prism of point group symmetry C ₁. The secondary building units result from three of the barium coordination polyhedra linked together via common edges. While one of the two tetra-hedral voids formed from these trimeric units is filled by one bidentate, chelating μ₂-selenate ion, the other one remains unoccupied as the corresponding second selenate ion only acts as a monodentate, μ₁-ligand. SBUs are completed by hexa-hydroxidostannate(IV) ions sharing adjacent edges on the uncapped faces of the three, mono-capped square anti-prisms. These SBUs are arranged into layers via common edges on the uncapped, square faces of the {BaO₉} coordination polyhedra in a way that the hexa-hydroxidostannate(IV) ions act as linkage between two neighboring layers.

SUBMITTER: Reuter H 

PROVIDER: S-EPMC9361368 | biostudies-literature | 2022 Aug

REPOSITORIES: biostudies-literature