Über Ethylmethyldiphenylammoniumpolyiodide (EtMePh2N)Ix mit x = 3, 5: Darstellung und strukturelle Charakterisierung eines Triiodids (EtMePh2N)I3 und eines Pentaiodids (EtMePh2N)I5

Studies on Polyhalides. 41. On Ethylmethyldiphenylammoniumpolyiodides (EtMePh₂N)I_x with x = 3, 5: Preparation and Crystal Structures of a Triiodide (EtMePh₂N)I₃ and a Pentaiodide (EtMePh₂N)I₅ So far unknown compounds (EtMePh₂N)I_x with x = 3 and 5 have been prepared and structurally characterized. The triiodide (EtMePh₂N)I₃ crystallizes monoclinically in C2/c with a = 3406.1(3) pm, b = 893.1(1) pm, c = 1222.7(1) pm, β = 99.24(1)° and Z = 8. The crystal structure contains cationic and two kinds of anionic layers alternating along 1 0 0]. One anionic layer is composed of triiodide ions forming the typical and widespread observed herring‐bone pattern. The other one contains zigzag chains (I^– · I₂) along 0 0 1] as a so far not observed structural motif. The pentaiodide (EtMePh₂N)I₅ crystallizes triclinically in P 1 with a = 1020.7(1) pm, b = 1023.1(1) pm, c = 1269.5(1) pm, α = 81.88(1)°, β = 72.66(1)°, γ = 60.65(1)° and Z = 2. The crystal structure is divided into along 0 1 1] alternating puckered cationic and anionic layers. The anions have the common shape of a V, but are here of the rare isolated type. From a topological view two pentaiodide ions are connected to chairlike decagonal rings which are concatenated along 0 1 1].