[5,11,17,23-Tetra-tert-butyl-25,27-(3,6-dioxaoctan-1,8-di­oxy)-26,28-bis­(pyridin-2-ylmeth­oxy)calix[4]arene]sodium iodide–1,2,4,5-tetra­fluoro-3,6-diiodo­benzene–methanol (2/3/4)

The title compound, [Na(C₆₂H₇₆N₂O₆)]I·1.5C₆F₄I₂·2CH₃OH, is composed of five components: a calix[4]arene derivative (hereinafter C4), a sodium cation, an iodide anion, a 1,2,4,5-tetra­fluoro-3,6-diiodo­benzene (tFdIB) mol­ecule and a methanol mol­ecule in a 1:1:1:1.5:2 ratio. The complex shows several inter­esting features: (i) the polyoxygenated loop of C4 effectively chelates a sodium cation in the form of a distorted octahedron and separates it from the iodide counter-ion, the shortest Na⁺...I⁻ distance being greater than 6.5 Å; (ii) the cavity of C4 is filled by a methanol mol­ecule; (iii) a second methanol mol­ecule is hydrogen-bonded to the N atom of a pyridinyl substituent pendant of C4 and halogen-bonded to the I atom of a tFdIB mol­ecule; (iv) the two I atoms of another tFdIB mol­ecule are halogen-bonded to two iodide anions, which act as monodentate halogen-bond acceptorss; (v) one of the two tFdIB molecules is located about a centre of inversion.

(Tris{2-[2-(2,3,5,6-tetra­fluoro-4-iodo­phen­oxy)eth­oxy]eth­yl}amine)­potassium iodide

The title adduct, [K(C₃₀H₂₄F₁₂I₃NO₆)]I, gives an extended tape of cations linked through I...I⁻ halogen bonds (XBs), two of them being quite short and one quite long. In the structure, the cation is hosted in a cavity formed by the arms of the podand which presents a closed conformation wherein two tetra­fluoro­iodo­benzene rings are near parallel [dihedral angle = 15.8 (4)°; centroid–centroid distance = 3.908 (5) Å] and the third ring is closer to orthogonal [dihedral angles = 66.28 (14) and 75.20 (19)°] to the other two rings. The coordination sphere of the K⁺ cation is composed of the six O atoms, the N atom and an F atom in the ortho position of one of the rings.