20959

Sigma-Aldrich

Cesium carbonate

puriss. p.a., ≥99.0%

Synonym(s):
Carbonic acid dicesium
Linear Formula:
Cs2CO3
CAS Number:
Molecular Weight:
325.82
Beilstein/REAXYS Number:
4546405
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

grade

puriss. p.a.

assay

≥99.0% (T)
≥99.0%

impurities

≤0.002% total nitrogen (N)

mp

610 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤20 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg

SMILES string

[Cs+].[Cs+].[O-]C([O-])=O

InChI

1S/CH2O3.2Cs/c2-1(3)4;;/h(H2,2,3,4);;/q;2*+1/p-2

InChI key

FJDQFPXHSGXQBY-UHFFFAOYSA-L

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General description

Cesium carbonate is an inorganic base generally used in C, N, O-arylation and alkylation reactions. It is also used in six-membered annulation, cross-coupling, intramolecular and intermolecular cyclizations, aza-Henry reaction, Horner-Emmons cyclization, and cycloaddition reactions.

Application

Cesium carbonate, an alkali metal carbonate, is a commonly used inorganic base in organic reactions.
Synthetic applications:
  • As a catalyst to synthesize quinazoline-2,4(1H,3H)-diones from substituted 2-aminobenzonitriles and carbon dioxide.
  • As a base to synthesize cyclic carbonates using halo- or tosyl-alcohols and carbon dioxide in the absence of any transition metal or organo catalyst.
  • In combination with alkyl halide and acetonitrile, it forms an effective system for the alkylation method of phenols.

Promotes the efficient O-alkylation of alcohols to form mixed alkyl carbonates.

Pictograms

CorrosionHealth hazard

Signal Word

Danger

Hazard Statements

hazcat

Eye Dam. 1 - Repr. 2 - STOT RE 2 Oral

storage_class_code

13 - Non Combustible Solids

WGK Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US),Eyeshields,Gloves

Certificate of Analysis

Certificate of Origin

Synthesis of cyclic carbonates with carbon dioxide and cesium carbonate.
Reithofer M R, et al.
Green Chemistry, 15(8), 2086-2090 (2013)
Cesium carbonate
e-EROS Encyclopedia of Reagents for Organic Synthesis (2016)
Cesium carbonate catalyzed efficient synthesis of quinazoline-2, 4 (1 H, 3 H)-diones using carbon dioxide and 2-aminobenzonitriles.
Patil Y P, et al.
Green Chemistry Letters and Reviews, 1(2), 127-132 (2008)
Cesium carbonate as a mediated inorganic base in some organic transformations
Rabie R, et al.
Research on Chemical Intermediates, 43(4), 1979-2015 (2017)
Cesium carbonate
e-EROS Encyclopedia of Reagents for Organic Synthesis. (2016)

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