Editing Interhalogen (section)

===Tetratomic interhalogens===
[[File:Chlorine-trifluoride-3D-vdW.png|thumb|175x175px|[[Chlorine trifluoride]]]]
*'''[[Chlorine trifluoride]]''' (ClF<sub>3</sub>) is a colourless gas that condenses to a green liquid, and freezes to a white solid. It is made by reacting chlorine with an excess of fluorine at 250&nbsp;°C in a [[nickel]] tube. It reacts more violently than fluorine, often explosively. The molecule is planar and [[T-shaped molecular geometry|T-shaped]]. It is used in the manufacture of [[uranium hexafluoride]].
*'''[[Bromine trifluoride]]''' (BrF<sub>3</sub>) is a yellow-green liquid that conducts electricity — it self-ionises to form [BrF<sub>2</sub>]<sup>+</sup> and [BrF<sub>4</sub>]<sup>−</sup>. It reacts with many metals and metal oxides to form similar ionised entities; with other metals, it forms the metal fluoride plus free bromine and [[oxygen]]; and with water, it forms hydrofluoric acid and hydrobromic acid. It is used in [[organic chemistry]] as a fluorinating agent. It has the same molecular shape as chlorine trifluoride.
*'''[[Iodine trifluoride]]''' (IF<sub>3</sub>) is a yellow solid that decomposes above −28&nbsp;°C. It can be synthesised from the elements, but care must be taken to avoid the formation of [[iodine pentafluoride|IF<sub>5</sub>]]. [[fluorine|F<sub>2</sub>]] attacks [[iodine|I<sub>2</sub>]] to yield IF<sub>3</sub> at −45&nbsp;°C in [[trichlorofluoromethane|CCl<sub>3</sub>F]]. Alternatively, at low temperatures, the fluorination reaction
::I<sub>2</sub> + 3&nbsp;[[xenon difluoride|XeF<sub>2</sub>]] → 2&nbsp;IF<sub>3</sub> + 3&nbsp;[[xenon|Xe]]
:can be used. Not much is known about iodine trifluoride as it is so unstable.
*'''[[Iodine trichloride]]''' (ICl<sub>3</sub>) forms lemon yellow crystals that melt under pressure to a brown liquid. It can be made from the elements at low temperature, or from iodine pentoxide and hydrogen chloride. It reacts with many metal chlorides to form tetrachloroiodides ({{chem|ICl|4|-}}), and hydrolyses in water. The molecule is a planar [[dimer (chemistry)|dimer]] (ICl<sub>3</sub>)<sub>2</sub>, with each iodine atom surrounded by four chlorine atoms.
*'''[[Iodine tribromide]]''' (IBr<sub>3</sub>) is a dark brown liquid.