(4,7,13,16,21,24-Hexaoxa-1,10-di-aza-bicyclo-[8.8.8]hexa-cosa-ne)sodium iodide-1,1,2,2,tetra-fluoro-1,2-diiodo-ethane (2/3).

ABSTRACT: The title complex (CX1), [Na(C18H36N2O6)]I·1.5C2F4I2, is a three-component adduct containing a [2.2.2]-cryptand, sodium iodide and 1,1,2,2-tetra-fluoro-1,2-di-iodo-ethane. The di-iodo-ethane works as a bidentate halogen-bonding (XB) donor, the [2.2.2]-cryptand chelates the sodium cation, and the iodide counter-ion acts as a tridentate XB acceptor. A (6,3) network is formed in which iodide anions are the nodes and halocarbons the sides. The network symmetry is C 3i and the I?I(-) XB distance is 3.4492?(5)?Å. This network is strongly deformed and wrinkled. It forms a layer 9.6686?(18)?Å high and the inter-layer distance is 4.4889?(10)?Å. The cations, inter-acting with each other via weak O?H hydrogen bonds, are confined between two anionic layers and also form a (6,3) net. The structure of CX1 is closely related to that of the KI homologue (CX2). The 1,1,2,2,-tetrafluoro-1,2-diiodoethane molecule is rotationally disordered around the I?I axis, resulting in an 1:1 disorder of the C2F4 moiety.

SUBMITTER: Cavallo G 

PROVIDER: S-EPMC3772422 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature