Hexakisdimethyltin(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 hexa-gonal host-guest title compound, polyhexa-kis-[[di-methyl-tin (IV) -di-μ-fluorido] potassium iodide], Sn (CH3) 2F26·KI n or (Me2SnF2) 6·KI, represents a layer structure of distorted Me2SnF4/2 octa-hedra corner-linked via μ2-bonding fluorine atoms. Distortion of the octa-hedra 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 octa-hedra are arranged according to a snub hexa-gonal tiling (sr3, 6) resulting in small trigonal and larger hexa-gonal 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.