(EtMe3N)I-5 has been prepared by the reaction of stoichiometric amounts of
ethyltrimethylammonium iodide and iodine in methanol. It crystallizes in th
e orthorhombic space group Pna2(1) with a=1011.3(1) pm, b=1255.3(2) pm, c =
1237.7(2) pm and Z = 4. The anionic iodine partial structure is composed o
f puckered layers which may be derived by deforming a quadratic net with io
dide ions in the knots and iodine molecules on the edges of the meshes.