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221775

Sigma-Aldrich

Copper(II) bromide

99%

Synonym(s):

brominating agent, Cupric bromide

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About This Item

Linear Formula:
CuBr2
CAS Number:
7789-45-9
Molecular Weight:
223.35
EC Number:
232-167-2
MDL number:
MFCD00010970
UNSPSC Code:
12161600
eCl@ss:
38150112
PubChem Substance ID:
24853260
NACRES:
NA.22

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

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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.

related product

Product No.
Description
Pricing

909424

Cu(OTs)2, ≥95%

Signal Word

Danger

Hazard Statements

H302,H314,H410

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Acute 1 - Aquatic Chronic 1 - Eye Dam. 1 - Skin Corr. 1B

Storage Class Code

8A - Combustible corrosive hazardous materials

WGK

WGK 3

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Certificates of Analysis (COA)

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Jian Wang et al.
Macromolecular rapid communications, 40(2), e1800332-e1800332 (2018-06-28)
Polymerization-induced self-assembly (PISA) and in situ crosslinking of the formed nanoparticles are successfully realized by activators regenerated by electron-transfer atom transfer radical polymerization (ARGET ATRP) of glycidyl methacrylate (GMA) or a mixture of GMA/benzyl methacrylate (BnMA) monomers in ethanol. Poly(oligo(ethylene
Synthesis, 1535-1535 (2007)
Denissova I and Barriault L
Handbook of Reagents for Organic Synthesis null
Lu-Ying Han et al.
Pharmaceutics, 11(2) (2019-01-30)
Icariin (ICA) is a major flavonoid that contains the active compound Epimedii Folium. However, ICA's pharmacokinetic characteristics remain unsatisfactory due to its low bioavailability, and hence limited drugability. In order to improve its pharmacokinetics and achieve prolonged blood circulation time
Yu Wang
Polymers, 11(8) (2019-07-31)
Atom transfer radical polymerization (ATRP) of methyl acrylate (MA) was carried out by continuous feeding of Cu(I) activators. Typically, the solvent, the monomer, the initiator, and the CuBr2/Me6TREN deactivator are placed in a Schlenk flask (Me6TREN: tris[2-(dimethylamino)ethyl]amine), while the CuBr/Me6TREN
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