Tungsten(IV) iodide

Tungsten iodide is a binary inorganic compound of tungsten metal and iodine with the chemical formula.

Preparation

Reaction of tungsten(VI) chloride with gaseous hydrogen iodide or concentrated hydroiodic acid:
Reaction of tungsten(IV) chloride with hydroiodic acid:

Physical properties

Tungsten iodide forms black crystals of the triclinic crystal system. Insoluble in cold water, diethyl ether, and chloroform. It dissolves in ethanol.

Chemical properties

The compound decomposes when heated in vacuum:
It hydrolyzes in hot water:
Reacts with chlorine and bromine: