Editing Halogen (section)

===== Interhalogen compounds =====
{{Main|Interhalogen}}

Interhalogen compounds are in the form of XY<sub>n</sub> where X and Y are halogens and n is one, three, five, or seven. Interhalogen compounds contain at most two different halogens. Large interhalogens, such as {{math|ClF<sub>3</sub>}} can be produced by a reaction of a pure halogen with a smaller interhalogen such as {{math|ClF}}. All interhalogens except {{math|[[iodine heptafluoride|IF<sub>7</sub>]]}} can be produced by directly combining pure halogens in various conditions.<ref name = "Chemistry of Interhalogens">{{Cite book|url = https://books.google.com/books?id=nvatWdX1ZWcC|title = Chemistry Of Interhalogen Compounds|year = 2007|access-date = February 27, 2013|isbn = 9788183562430|last1 = Saxena|first1 = P. B| publisher=Discovery Publishing House }}</ref>

Interhalogens are typically more reactive than all diatomic halogen molecules except F<sub>2</sub> because interhalogen bonds are weaker. However, the chemical properties of interhalogens are still roughly the same as those of [[diatomic]] halogens. Many interhalogens consist of one or more atoms of fluorine bonding to a heavier halogen. Chlorine and bromine can bond with up to five fluorine atoms, and iodine can bond with up to seven fluorine atoms. Most interhalogen compounds are [[covalent]] gases. However, some interhalogens are liquids, such as BrF<sub>3</sub>, and many iodine-containing interhalogens are solids.<ref name = "Chemistry of Interhalogens"/>