Hexakis[dimethyltin(IV) difluoride] potassium iodide, 6Me 2 SnF 2 ·KI: linear rods of potassium iodide penetrating the pores in planar layers of dimethyltin(IV) difluoride

The hexagonal host–guest title compound, poly[hexakis[[dimethyltin(IV)]-di-μ-fluorido] potassium iodide], {[Sn(CH 3 ) 2 F 2 ] 6 ·KI} n or (Me 2 SnF 2 ) 6 ·KI, represents a layer structure of distorted {Me 2 SnF 4/2 } octahedra corner-linked via μ 2 -bonding fluorine atoms. Distortion of the octahedra concerns not only bond lengths [ d (Sn—C) = 2.089 (2) Å, d (Sn—F) = 2.077 (1)/2.080 (1), 2.252 (1)/2.266 (1) Å] but also bond angles [〈(C—Sn—C) = 162.2 (1)°, 〈(F—Sn—F) = 77.11 (7)–119.57 (5)°] giving rise to a irregular quadrilateral, pseudo-equatorial plane of fluorine atoms around the central tin atom. In the planar (001) layers, the octahedra are arranged according to a snub hexagonal tiling (sr{3,6}) resulting in small trigonal and larger hexagonal pores. The latter are occupied by potassium ions [ d (F...K) = 2.702 (2) Å, 6×], which in turn form linear rods with iodine ions [ d (K...I) = 3.6702 (2) Å, 2×) perpendicular to adjacent layers.