Back فلوريد السيزيوم Arabic سزیوم فلوئورید AZB সিজিয়াম ফ্লোরাইড Bengali/Bangla Fluorur de cesi Catalan Fluorid cesný Czech Caesiumfluorid German Φθοριούχο καίσιο Greek Zesio fluoruro Basque سزیم فلوئورید Persian Cesiumfluoridi Finnish

Caesium fluoride

Caesium fluoride
Caesium fluoride
Caesium fluoride
Names
IUPAC name
Caesium fluoride
Other names
Cesium fluoride
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.033.156 Edit this at Wikidata
EC Number
  • 236-487-3
RTECS number
  • FK9650000
UNII
  • InChI=1S/Cs.FH/h;1H/q+1;/p-1 checkY
    Key: XJHCXCQVJFPJIK-UHFFFAOYSA-M checkY
  • InChI=1/Cs.FH/h;1H/q+1;/p-1
    Key: XJHCXCQVJFPJIK-REWHXWOFAY
  • [F-].[Cs+]
Properties
CsF
Molar mass 151.903 g/mol[1]
Appearance white crystalline solid
Density 4.64 g/cm3[1]
Melting point 703 °C (1,297 °F; 976 K)[1]
Boiling point 1,251 °C (2,284 °F; 1,524 K) (2,284 °F; 1,524 K)
573.0 g/100 mL (25 °C)[1]
Solubility Insoluble in acetone, diethyl ether, pyridine and ethanol
191 g/100 mL in methanol.
Basicity (pKb) −744 kJ/mol
-44.5·10−6 cm3/mol[2]
1.477
Structure
cubic, cF8
Fm3m, No. 225[3]
a = 0.6008 nm[3]
0.2169 nm3[3]
4
Octahedral
7.9 D
Thermochemistry
51.1 J/mol·K[4]
92.8 J/mol·K[4]
-553.5 kJ/mol[4]
-525.5 kJ/mol[4]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 toxic
GHS labelling:
GHS05: CorrosiveGHS06: ToxicGHS08: Health hazard
Danger
H301, H311, H315, H318, H331, H361f
P201, P202, P260, P261, P264, P270, P271, P280, P281, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P308+P313, P310, P311, P312, P321, P322, P330, P332+P313, P361, P362, P363, P403+P233, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
3
0
0
Flash point Non-flammable
Safety data sheet (SDS) External MSDS
Related compounds
Other anions
 Caesium chloride
Caesium bromide
Caesium iodide
Caesium astatide
Other cations
 Lithium fluoride
Sodium fluoride
Potassium fluoride
Rubidium fluoride
Francium fluoride
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Caesium fluoride (cesium fluoride in American English) is an inorganic compound with the formula CsF. A hygroscopic white salt, caesium fluoride is used in the synthesis of organic compounds as a source of the fluoride anion.[5] The compound is noteworthy from the pedagogical perspective as caesium also has the highest electropositivity of all commonly available elements and fluorine has the highest electronegativity.

  1. ^ a b c d Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.57. ISBN 1-4398-5511-0.
  2. ^ Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.132. ISBN 1-4398-5511-0.
  3. ^ a b c Davey, Wheeler P. (1923). "Precision Measurements of Crystals of the Alkali Halides". Physical Review. 21 (2): 143–161. Bibcode:1923PhRv...21..143D. doi:10.1103/PhysRev.21.143.
  4. ^ a b c d Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 5.10. ISBN 1-4398-5511-0.
  5. ^ Friestad, Gregory K.; Branchaud, Bruce P.; Navarrini, Walter; Sansotera, Maurizio (2007). "Cesium Fluoride". Encyclopedia of Reagents for Organic Synthesis. doi:10.1002/047084289X.rc050.pub2. ISBN 978-0-471-93623-7.

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