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198323

Sigma-Aldrich

Cesium fluoride

99%

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Synonym(s):
NSC 84270
Empirical Formula (Hill Notation):
CsF
CAS Number:
Molecular Weight:
151.90
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

assay

99%

form

liquid

mp

682 °C (lit.)

density

4.115 g/mL at 25 °C (lit.)

SMILES string

[F-].[Cs+]

InChI

1S/Cs.FH/h;1H/q+1;/p-1

Inchi Key

XJHCXCQVJFPJIK-UHFFFAOYSA-M

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This Item
28934544190220990
vibrant-m

198323

Cesium fluoride

vibrant-m

289345

Cesium fluoride

vibrant-m

441902

Cesium carbonate

vibrant-m

20990

Cesium fluoride

form

liquid

form

-

form

powder and chunks

form

-

assay

99%

assay

99.9% trace metals basis

assay

99%

assay

≥98.0%

density

4.115 g/mL at 25 °C (lit.)

density

4.115 g/mL at 25 °C (lit.)

density

-

density

4.115 g/mL at 25 °C (lit.)

mp

682 °C (lit.)

mp

682 °C (lit.)

mp

610 °C (dec.) (lit.)

mp

682 °C (lit.)

General description

Cesium fluoride is an inorganic compound known to be a source of fluoride ion and a catalyst in organic synthesis. It has been used in many organic reactions like 1,4−elimination, desilylation, transesterification, acylation, nucleophilic aromatic substitution, etherification, cross−coupling reactions and so on.

application

Cesium fluoride can be used as:
  • A base in the Suzuki cross-coupling synthesis of ortho-substituted biaryls.
  • A reagent for the nucleophilic fluorination of primary halides and sulfonates in protic media such as tert-butyl and tert-pentyl alcohols.

Reactant for:
  • Preparation of building blocks for synthesis of fluoroallylic compounds
  • Synthesis of alcohols via hydrolysis of alkyl silyl ethers at neutral pH in buffered mixed organic-aqueous solutions
  • Nucleophilic fluorination of alkynyliodonium salts to form fluorovinylic compounds
  • Nucleophilic aromatic substitution (SNAr) reactions
Used in the successful synthesis of a single-crystal Dion-Jacobson phase, CsLaTa2O7, that has applications in photocatalysis and superconductivity.

signalword

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 3 - Eye Dam. 1 - Repr. 2 - STOT RE 2

supp_hazards

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 2

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges


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A new class of SN2 reactions catalyzed by protic solvents: facile fluorination for isotopic labeling of diagnostic molecules
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A cesium fluoride promoted efficient and rapid multicomponent synthesis of functionalized 2-amino-3-cyano-4H-pyran and spirooxindole derivatives
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An efficient catalyst for the synthesis of ortho-substituted biaryls by the Suzuki cross-coupling: Triphenylphosphine adduct of cyclopalladated ferrocenylimine
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Aprotic solvents are usually preferred for the SN2 reactions, because nucleophilicity and hence SN2 reactivity are severely retarded by the influence of the partial positive charge of protic solvents. In this work, we introduce a remarkable effect of using tertiary

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