Radon difluoride

{{Chembox

| ImageFile = Radon-difluoride-CPK.png

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| Watchedfields = changed

| verifiedrevid = 400873837

| IUPACName = Radon difluoride

| OtherNames = Radon(II) fluoride

|Section1={{Chembox Identifiers

| CASNo = 18976-85-7

| CASNo_Ref = {{Cascite|changed|CAS}}

| ChemSpiderID = 95685049

| SMILES = F[Rn]F

| StdInChI_Ref = {{stdinchicite|changed|chemspider}}

| StdInChI = 1S/F2Rn/c1-3-2

| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}

| StdInChIKey = UEHKUMAZJPZVMJ-UHFFFAOYSA-N

}}

|Section2={{Chembox Properties

| Formula=RnF₂

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Radon difluoride ({{chem|Rn||F|2}}) is a compound of radon, a radioactive noble gas. Radon reacts readily with fluorine to form a solid compound, but this decomposes on attempted vaporization and its exact composition is uncertain.{{cite journal |last1=Fields |first1=Paul R. |last2=Stein |first2=Lawrence |last3=Zirin |first3=Moshe H. |year=1962 |title=Radon Fluoride |journal=Journal of the American Chemical Society |doi=10.1021/ja00880a048 |volume=84 |issue=21 |pages=4164–4165}}{{cite journal |last=Stein |first=Lawrence |year=1970 |title=Ionic Radon Solution |journal=Science |pmid=17809133 |bibcode=1970Sci...168..362S |doi=10.1126/science.168.3929.362 |volume=168 |issue=3929 |pages=362–4|s2cid=31959268 }} Calculations suggest that it may be ionic,{{cite journal |last=Pitzer |first=Kenneth S. |year=1975 |title=Fluorides of radon and element 118 |journal=J. Chem. Soc., Chem. Commun. |doi=10.1039/C3975000760b |issue=18 |pages=760b–761 |url=https://escholarship.org/uc/item/8xz4g1ff}} unlike all other known binary noble gas compounds. The usefulness of radon compounds is limited because of the radioactivity of radon. The longest-lived isotope, radon-222, has a half-life of only 3.82 days, which decays by α-emission to yield polonium-218.{{cite book |last=Stein |first=Lawrence |year=1987 |title=Radon and its Decay Products |chapter=Chemical Properties of Radon |series=ACS Symposium Series |isbn=978-0-8412-1015-8 |doi=10.1021/bk-1987-0331.ch018 |volume=331 |pages=240–251 |chapter-url=https://digital.library.unt.edu/ark:/67531/metadc1096539/}}