查看“︁二氟化二硫”︁的源代码

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| ImageFile = Disulfur-difluoride-2D-dimensions.png
| ImageSize = 250px
| ImageFileL2 = Disulfur-difluoride-3D-balls.png
| ImageSizeL2 = 125px
| ImageFileR2 = Disulfur-difluoride-3D-vdW.png
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| IUPACName = fluorosulfanyl thiohypofluorite
| OtherNames = 
| Section1 = {{Chembox Identifiers
|  CASNo = 13709-35-8
|  CASNo_Ref = {{cascite|correct|CAS}}
|  PubChem = 123323
|  ChemSpiderID = 109926
|  SMILES = FSSF
|  InChI = InChI=1S/F2S2/c1-3-4-2
  }}
| Section2 = {{Chembox Properties
|  Formula = S<sub>2</sub>F<sub>2</sub>
|  MolarMass = 102.127
|  Appearance = 
|  Density = 
|  MeltingPt = 
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| Section3 = {{Chembox Hazards
|  MainHazards = 
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}}
'''二氟化二硫'''是一种[[硫]]的卤化物，化学式为S<sub>2</sub>F<sub>2</sub>。在严格干燥的容器中用[[二氟化银]]和[[硫]]单质，可得结构式为FS-SF的二氟化二硫：<ref>{{cite journal|doi=10.1016/0022-2852(91)90109-N|title=The microwave spectrum of the chain isomer of disulfur difluoride: FS-SF|year=1991|last1=Davis|first1=R.Wellington|last2=Firth|first2=Steven|journal=Journal of Molecular Spectroscopy|volume=145|issue=2|pages=225}}</ref>

:<math>\rm \ 2S + 2AgF_2 \xrightarrow{398K} S_2F_2 + 2AgF</math>

存在[[碱金属]][[氟化物]]时，二氟化二硫会发生分子内重排，转变为[[硫代氟化亚砜|S<nowiki>=</nowiki>SF<sub>2</sub>]]：<ref>{{cite journal|doi=10.1016/0022-2852(86)90134-7|title=The microwave spectrum of the pyramidal isomer of disulfur difluoride: S=SF2|year=1986|last1=Davis|first1=R.Wellington|journal=Journal of Molecular Spectroscopy|volume=116|issue=2|pages=371}}</ref>

:<math>\rm \ FS-SF \xrightarrow{KF} S=SF_2</math>

S=SF<sub>2</sub>也可由[[氟亚磺酸钾]]与[[二氯化二硫]]反应制得：

:<math>\rm \ 2KSO_2F + S_2Cl_2 \rightarrow S=SF_2 + 2KCl + 2SO_2</math><ref>{{cite book|title=《无机化学丛书》第五卷：氧、硫、硒分族|pages=P179|author=张青莲|isbn=7-03-002238-6|location=北京|publisher=科学出版社}}</ref>

== 反应 ==
* 加热时分解成[[四氟化硫]]和[[硫]]：
::2S<sub>2</sub>F<sub>2</sub> ->SF<sub>4</sub> + 3S 

* 水解反应：
::2S<sub>2</sub>F<sub>2</sub> + 2H<sub>2</sub>O -> SO<sub>2</sub> + 3S + 4HF 

* 和[[硫酸]]的反应：
::S<sub>2</sub>F<sub>2</sub>+ 3H<sub>2</sub>SO<sub>4</sub> -> 5SO<sub>2</sub> + 2HF+ 2H2O 

* 和[[氢氧化钠]]的反应：
::2S<sub>2</sub>F<sub>2</sub> + 6NaOH -> Na2SO<sub>3</sub> + 3S + 4NaF + 3H<sub>2</sub>O 

* 在高压下和氧气反应，[[催化剂]]为[[二氧化氮]]：
::2S<sub>2</sub>F<sub>2</sub> + 5O<sub>2</sub> —NO<sub>2</sub>-> SOF<sub>4</sub> + 3SO<sub>3</sub> <ref>Справочник химика / Редкол.: Никольский Б.П. и др.. — 3-е изд., испр. — Л.: Химия, 1971. — Т. 2. — 1168 с. {{in lang|ru}}</ref><ref>Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1995. — Т. 4. — 639 с. — {{ISBN|978-5-85270-092-6}} {{in lang|ru}}</ref><ref>Лидин Р.А. и др. Химические свойства неорганических веществ: Учеб. пособие для вузов. — 3-е изд., испр. — М.: Химия, 2000. — 480 с. — {{ISBN|978-5-7245-1163-6}} {{in lang|ru}}</ref>

* 在低温下和[[二氟化硫]]反应，形成{{le|1,3-二氟三硫烷-1,1-二氟化物|1,3-Difluoro-trisulfane-1,1-difluoride}}。
::SSF<sub>2</sub> + SF<sub>2</sub> → FSSSF<sub>3</sub><ref>{{cite journal|last1=Lösking|first1=O.|last2=Willner|first2=H.|last3=Baumgärtel|first3=H.|last4=Jochims|first4=H. W.|last5=Rühl|first5=E.|title=Chalkogenfluoride in niedrigen Oxydationsstufen. X Thermochemische Daten und Photoionisations-Massenspektren von SSF2, FSSF, SF3SF und SF3SSF|journal=Zeitschrift für anorganische und allgemeine Chemie|date=November 1985|volume=530|issue=11|pages=169–177|doi=10.1002/zaac.19855301120}}</ref>

== 参考资料 ==
{{reflist}}

{{硫化合物}}{{氟化物}}{{无机化合物小作品}}

[[Category:氟化物]]
[[Category:硫的氟化物]]