221775

Copper(II) bromide

99%

• Synonym(s): brominating agent, Cupric bromide
• Linear Formula: CuBr₂
• CAS Number: 7789-45-9
• Molecular Weight: 223.35
• EC Number: 232-167-2
• MDL number: MFCD00010970
• UNSPSC Code: 12352300
• eCl@ss: 38150112
• PubChem Substance ID: 24853260
• NACRES: NA.22

Properties

• Quality Level: 200
• assay: 99%
• form: solid
• reaction suitability: core: copper; reagent type: catalyst
• mp: 498 °C (lit.)
• density: 4.77 g/mL at 25 °C (lit.)
• SMILES string: Br[Cu]Br
• InChI: 1S/2BrH.Cu/h2*1H;/q;;+2/p-2
• InChI key: QTMDXZNDVAMKGV-UHFFFAOYSA-L

Description

General description

Cuprous bromide may be prepared by the reduction of cupric bromide or CuSO₄-NaBr. In the molten state, it is grayish brown /greenish brown in color.

Application

Some reported applications of copper bromide are:

• catalyst in cross coupling reactions.
• co-catalyst in Sonogashira coupling.
• Lewis acid in enantioselective addition of alkynes.
• reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.

Reductive homocoupling of α-bromo- α- chlorocarboxylates to dimethyl α, α′ dichlorosuccinate derivatives in presence of CuBr/LiOCH₃ in methanol has been reported.

Safety Information

• pictograms: GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H302 - H314 - H410
• pcodes: P260 - P273 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B
• Storage Class: 8A - Combustible, corrosive hazardous materials
• wgk_germany: WGK 3
• ppe: Eyeshields, Faceshields, Gloves, type P3 (EN 143) respirator cartridges