The Binary Iodine-Chlorine Octahalide Series [I Cl ] (n=3, 3.6, 4).

The octanuclear iodine-chlorine interhalides [I Cl ] and [I Cl ] were prepared in two steps. Firstly, addition of ICl to the triaminocyclopropenium chloride salt [C (NEt ) ]Cl forms the trihalide ICl salt, secondly, addition of half an equivalent of I or ICl, respectively, gave the desired products upon crystallization at low temperature. The non-stoichiometric octahalide [I Cl ] was obtained after heating a CH Cl solution of the ICl salt to reflux for 2 hours followed crystallization.

Rational Synthesis, Structures and Properties of the Ionic Liquid Binary Iodine-Bromine Octahalide Series [I Br ] (n=0, 2, 3, 4).

A series of octanuclear iodine-bromine interhalides [I Br ] (n=0, 2, 3, 4) were prepared systematically in two steps. Firstly, addition of a dihalogen (Br or IBr) to the triaminocyclopropenium bromide salt [C (NEt ) ]Br forms the corresponding trihalide salt with Br or IBr anions, respectively. Secondly, addition to Br of half an equivalent of Br gives the octabromine polyhalide [Br ] , whereas addition to IBr of half an equivalent of Br , IBr or I gives the corresponding interhalides: [I Br ] , [I Br ] , and [I Br ] , respectively.