Chlorine monofluoride

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Chlorine monofluoride
Chlorine-monofluoride-2D-dimensions.png
Chlorine-monofluoride-3D-vdW.png
Identifiers
CAS number 7790-89-8 YesY=
PubChem 123266
ChemSpider 109879 N
Jmol-3D images Image 1
Properties
Molecular formula ClF
Molar mass 54.45 g/mol
Density 1.62 g mL
(liquid, −100 °C)
Melting point −155.6 °C (−248.1 °F; 117.5 K)
Boiling point −100.1 °C (−148.2 °F; 173.1 K)
Structure
Dipole moment 0.881 D
(2.94 × 10−30 C m)
Thermochemistry
Specific
heat capacity
C
33.01 J K−1 mol−1
Std molar
entropy
So298
217.91 J K−1 mol−1
Std enthalpy of
formation
ΔfHo298
−56.5 kJ mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N (verify) (what is: YesY/N?)
Infobox references

Chlorine monofluoride is a volatile interhalogen compound with the chemical formula ClF. It is a colourless gas at room temperature and is stable even at high temperatures. When cooled to −100 °C, ClF condenses as a pale yellow liquid. Many of its properties are intermediate between its parent halogens, Cl2 and F2.[1]

Reactivity[edit]

Chlorine monofluoride is a versatile fluorinating agent, converting metals and non-metals to their fluorides and releasing Cl2 in the process. For example, it converts tungsten to tungsten hexafluoride and selenium to selenium tetrafluoride:

W + 6 ClF → WF6 + 3 Cl2
Se + 4 ClF → SeF4 + 2 Cl2

ClF can also chlorofluorinate compounds, either by addition across a multiple bond or via oxidation. For example, it adds fluorine and chlorine across the triple bond of carbon monoxide:

CO + ClF → Carbonyl-chlorofluoride-2D.png

See also[edit]

References[edit]

  1. ^ Otto Ruff, E. Ascher (1928). "Über ein neues Chlorfluorid-CIF3". Zeitschrift für anorganische und allgemeine Chemie 176 (1): 258–270. doi:10.1002/zaac.19281760121. 

External links[edit]