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289345

Sigma-Aldrich

Cesium fluoride

99.9% trace metals basis

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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

Quality Level

assay

99.9% trace metals basis

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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1 of 4

This Item
200107213365204315
Cesium fluoride 99.9% trace metals basis

289345

Cesium fluoride

Selenium dioxide ≥99.9% trace metals basis

200107

Selenium dioxide

Selenium dioxide ReagentPlus®, powder, 99.8% trace metals basis

213365

Selenium dioxide

Selenium dioxide 99.999% trace metals basis

204315

Selenium dioxide

mp

682 °C (lit.)

mp

315 °C (subl.) (lit.)

mp

315 °C (subl.) (lit.)

mp

315 °C (subl.) (lit.)

density

4.115 g/mL at 25 °C (lit.)

density

-

density

-

density

-

Application

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.
Used as a base in a Suzuki cross-coupling synthesis of ortho-substituted biaryls. Also employed as a reagent for nucleophilic fluorination of primary halides and sulfonates in protic media such as tert-butyl and tert-pentyl alcohols.

signalword

Danger

Hazard Classifications

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

supp_hazards

Storage Class

11 - 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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Journal of Organometallic Chemistry, 691, 5688-5688 (2006)
Dong Wook Kim et al.
Journal of the American Chemical Society, 128(50), 16394-16397 (2006-12-15)
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
S Nelson et al.
Science (New York, N.Y.), 265(5173), 774-777 (1994-08-05)
Neurons in the primary visual cortex of the cat are selectively activated by stimuli with particular orientations. This selectivity can be disrupted by the application of antagonists of the inhibitory neurotransmitter gamma-aminobutyric acid (GABA) to a local region of the
L Bertollini et al.
Neuroreport, 5(5), 553-556 (1994-01-31)
The effect of intracellular fluoride ions on voltage-dependent calcium currents was tested during whole-cell voltage-clamp recordings in thalamic neurones acutely dissociated from young adult rats. It is demonstrated that 5-30 mM intracellular fluoride selectively and reversibly suppresses the high voltage-activated
E J Devor et al.
Alcohol and alcoholism (Oxford, Oxfordshire). Supplement, 1, 157-160 (1991-01-01)
The stimulated activity of platelet adenylate cyclase (AC) has been shown to be significantly lower among alcoholics compared with controls. In this report we demonstrate that stimulated platelet AC activity is under the control of a single major gene locus.

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