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	{{chembox		{{Chembox
			| Verifiedfields = changed
⚫	| verifiedrevid = 400415453
			| Watchedfields = changed
⚫	| Name = Chlorine monofluoride
		⚫	| verifiedrevid = 446442027
	| ImageFile = Chlorine-monofluoride-2D-dimensions.png
	| ImageFile1 = Chlorine-monofluoride-3D-vdW.png		| Name = Chlorine monofluoride
	| IUPACName = Chlorine monofluoride		| ImageFile = Chlorine-monofluoride-2D-dimensions.png
	| OtherNames = Chlorine fluoride		| ImageFile1 = Chlorine-monofluoride-3D-vdW.png
		⚫	| IUPACName = Chlorine monofluoride
⚫	| Section1 = {{Chembox Identifiers
			| OtherNames = Chlorine fluoride
			| SystematicName =
		⚫	| Section1 = {{Chembox Identifiers
	| CASNo = 7790-89-8		| CASNo = 7790-89-8
	| CASNo_Ref =		| CASNo_Ref = {{cascite|correct|??}}
	| CASOther =		| CASNoOther =
			| UNII_Ref = {{fdacite|correct|FDA}}
⚫	| RTECS =
	| EINECS =		| UNII = UE4699O6C6
		⚫	| RTECS =
⚫	}}
			| EINECS =
⚫	| Section2 = {{Chembox Properties
	| Formula = ClF		| PubChem = 123266
			| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
⚫	| MolarMass = 54.45 g mol<sup>−1</sup>
			| ChemSpiderID = 109879
⚫	| MeltingPt = −155.6 °C
			| SMILES = FCl
⚫	| BoilingPt = −100.1 °C
			| InChI = 1/FCl/c1-2
⚫	| Density = 1.62 g mL <br />(liquid, −100 °C)
			| InChIKey = OMRRUNXAWXNVFW-UHFFFAOYAD
⚫	}}
			| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
⚫	| Section3 = {{Chembox Structure
			| StdInChI = 1S/FCl/c1-2
⚫	| Dipole = 0.881 ]<br />(2.94 × 10<sup>−30</sup> ] m)
			| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
⚫	}}
			| StdInChIKey = OMRRUNXAWXNVFW-UHFFFAOYSA-N
⚫	| Section4 = {{Chembox Thermochemistry
		⚫	}}
⚫	| DeltaHf = −56.5 kJ mol<sup>−1</sup>
		⚫	| Section2 = {{Chembox Properties
⚫	| Entropy = 217.91 J K<sup>−1</sup> mol<sup>−1</sup>
			| Formula = ClF
		⚫	| MolarMass = 54.45 g/mol
		⚫	| MeltingPtC = −155.6
		⚫	| BoilingPtC = −100.1
		⚫	| Density = 1.62 g mL<br/>(liquid, −100 °C)
		⚫	}}
		⚫	| Section3 = {{Chembox Structure
		⚫	| Dipole = 0.881 ]<br/>(2.94 × 10<sup>−30</sup> ] m)
		⚫	}}
		⚫	| Section4 = {{Chembox Thermochemistry
		⚫	| DeltaHf = −56.5 kJ mol<sup>−1</sup>
		⚫	| Entropy = 217.91 J K<sup>−1</sup> mol<sup>−1</sup>
	| HeatCapacity = 33.01 J K<sup>−1</sup> mol<sup>−1</sup>		| HeatCapacity = 33.01 J K<sup>−1</sup> mol<sup>−1</sup>
	}}		}}
			| Section5 =
			| Section6 =
	}}		}}
	'''Chlorine monofluoride''' is a ] ] with the ] 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 ]s, ] and ].<ref>{{cite journal		'''Chlorine monofluoride''' is a ] ] compound with the ] ClF. It is a colourless gas at room temperature and is stable even at high temperatures. When cooled to −100&nbsp;°C, ClF condenses as a pale yellow liquid. Many of its properties are intermediate between its parent ]s, ] and ].<ref>{{cite journal
	| title = Über ein neues Chlorfluorid-CIF<sub>3</sub>		| title = Über ein neues Chlorfluorid-CIF<sub>3</sub>
	| author = ], E. Ascher		| author = ], E. Ascher
	| journal = ]		| journal = ]
	| year = 1928		| year = 1928
	| volume = 176		| volume = 176
	| issue = 1		| issue = 1
	| pages = 258–270		| pages = 258–270
	| doi = 10.1002/zaac.19281760121		| doi = 10.1002/zaac.19281760121
	}}</ref>		}}</ref>
			==Geometry==
			The molecular structure in the gas phase was determined by microwave spectroscopy; the bond length is ''r''<sub>e</sub>&nbsp;= 1.628341(4)&nbsp;Å.<ref>{{Cite journal |last1=Willis |first1=Robert E. |last2=Clark |first2=William W. |date=May 1980 |title=Millimeter wave measurements of the rotational spectra of ClF, BrF, BrCl, ICl, and IBr |url=https://pubs.aip.org/aip/jcp/article/72/9/4946-4950/790283 |journal=The Journal of Chemical Physics |language=en |volume=72 |issue=9 |pages=4946–4950 |doi=10.1063/1.439780 |bibcode=1980JChPh..72.4946W |issn=0021-9606}}</ref>
			The bond length in the crystalline ClF is 1.628(1)&nbsp;Å; the lengthening relative to the free molecule is due to an interaction of the type F-Br···ClMe with a distance of 2.640(1)&nbsp;Å. In its molecular packing it shows very short intermolecular Cl···Cl contacts of 3.070(1)&nbsp;Å between neighboring molecules.<ref>{{Cite journal |last1=Boese |first1=Roland |last2=Boese |first2=A. Daniel |last3=Bláser |first3=Dieter |last4=Antipin |first4=Michail Yu. |last5=Ellern |first5=Arkadi |last6=Seppelt |first6=Konrad |date=1997-08-04 |title=The Surprising Crystal Packing of Chlorinefluoride |url=http://dx.doi.org/10.1002/anie.199714891 |journal=Angewandte Chemie International Edition in English |volume=36 |issue=1314 |pages=1489–1492 |doi=10.1002/anie.199714891 |issn=0570-0833|doi-access=free }}</ref>
	==Reactivity==		==Reactivity==
	Chlorine monofluoride is a versatile ], converting metals and non-metals to their fluorides and releasing Cl<sub>2</sub> in the process. For example, it converts ] to ] and ] to ]:		Chlorine monofluoride is a versatile ], converting metals and non-metals to their fluorides and releasing Cl<sub>2</sub> in the process. For example, it converts ] to ] and ] to ]:
	:W + 6 ClF → WF<sub>6</sub> + 3 Cl<sub>2</sub>		:W + 6 ClF → WF<sub>6</sub> + 3 Cl<sub>2</sub>
	:Se + 4 ClF → SeF<sub>4</sub> + 2 Cl<sub>2</sub>		:Se + 4 ClF → SeF<sub>4</sub> + 2 Cl<sub>2</sub>
	ClF can also chlorofluorinate compounds, either by addition across a ] or via ]. For example, it adds fluorine and chlorine across the triple bond of ]:		FCl can also chlorofluorinate compounds, either by addition across a ] or via ]. For example, it adds fluorine and chlorine to the carbon of ], yielding carbonyl chloride fluoride:
		⚫	:CO + ClF → ]
⚫	:CO + ClF → ]
	==See also==		==See also==
	* ]		*]s
		⚫	*]
	==References==		==References==
			{{Reflist}}
	<references/>
	==External links==		==External links==
	*		*
	*		*
	{{Chlorine compounds}}		{{Chlorine compounds}}
			{{Fluorides}}
	]		]
			]
	]		]
	]		]
	]		]
	]		]
	]
	]
	]
	]
	]
	]
	]
⚫	]
	]