Interhalogen Compounds - Hexatomic Interhalogens

Hexatomic Interhalogens

• Chlorine pentafluoride (ClF₅) is a colourless gas, made by reacting chlorine trifluoride with fluorine at high temperatures and high pressures. It reacts violently with water and most metals and nonmetals.
• Bromine pentafluoride (BrF₅) is a colourless fuming liquid, made by reacting bromine trifluoride with fluorine at 200°C. It is physically stable, but reacts violently with water and most metals and nonmetals.
• Iodine pentafluoride (IF₅) is a colourless liquid, made by reacting iodine pentoxide with fluorine, or iodine with silver(II) fluoride. It is highly reactive, even slowly with glass. It reacts with elements, oxides and carbon halides. The molecule has the form of a tetragonal pyramid.
• Iodine pentabromide (IBr₅), if it exists (there is some dispute on this point), is a dark reddish-brown liquid or brown-yellow to colorless crystalline solid, made by reacting iodine with bromine at 60°C. In its liquid state it resembles bromine in most properties; in any state, it is very toxic. It is unstable upon heating above the boiling point of bromine, yielding bromine vapor and iodine monobromide.