World Library  
Flag as Inappropriate
Email this Article

Copper(I) bromide

Article Id: WHEBN0006622512
Reproduction Date:

Title: Copper(I) bromide  
Author: World Heritage Encyclopedia
Language: English
Subject: Copper(II) bromide, Copper(I) iodide, Inorganic compounds by element, Copper, Caesium hexafluorocuprate(IV)
Collection: Bromides, Copper Compounds, Metal Halides
Publisher: World Heritage Encyclopedia
Publication
Date:
 

Copper(I) bromide

CuBr redirects here. For the 'Centro Universitario de Bienestar Rural', see FUNDAEC.'
Copper(I) bromide
Sample of copper(I) bromide
Structure of CuBr
Names
Other names
Cuprous bromide
Identifiers
 Y
ChemSpider  Y
Jmol-3D images Image
PubChem
Properties
CuBr
Molar mass 143.45 g/mol
Appearance green powder (see text)
Density 4.71 g/cm3, solid
Melting point 492 °C (918 °F; 765 K)
Boiling point 1,345 °C (2,453 °F; 1,618 K)
slightly soluble
Solubility soluble in HCl, HBr, ammonium hydroxide, acetonitrile
negligible in acetone, sulfuric acid
2.116
1.46 D
Hazards
Flash point Non-flammable
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3 (as Cu)[1]
REL (Recommended)
TWA 1 mg/m3 (as Cu)[1]
TWA 100 mg/m3 (as Cu)[1]
Related compounds
Other anions
Copper(I) chloride
Copper(I) iodide
Other cations
Silver(I) bromide
Copper(II) bromide
Mercury(I) bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
 Y  (: Y/N?)

Copper(I) bromide is the synthesis of organic compounds.

Contents

  • Preparation, basic properties, structure 1
  • Applications in organic chemistry 2
  • References 3
  • External links 4

Preparation, basic properties, structure

The pure solid is colourless, although samples are often colored due to the presence of copper(II) impurities (see picture).[2] The copper(I) ion also oxidizes easily in air. It is commonly prepared by the reduction of cupric salts with sulfite in the presence of bromide.[3] For example, the reduction of copper(II) bromide with sulfite yields copper(I) bromide and hydrogen bromide:

2 CuBr2 + H2O + SO32− → 2 CuBr + SO42− + 2 HBr

CuBr is insoluble in most solvents due to its polymeric structure, which features four-coordinated, tetrahedral Cu centers interconnected by bromide ligands (ZnS structure). Upon treatment with Lewis bases, CuBr converts to molecular adducts. For example with dimethyl sulfide, the colorless complex is formed:[4]

CuBr + S(CH3)2 → CuBr(S(CH3)2)

In this coordination complex, the copper is two-coordinate, with a linear geometry. Other soft ligands afford related complexes. For example triphenylphosphine gives CuBr(P(C6H5)3), although this species has a more complex structure.

Applications in organic chemistry

In the Sandmeyer reaction, CuBr is employed to convert diazonium salts into the corresponding aryl bromides:[3]

ArN2+ + CuBr → ArBr + N2 + Cu+

The aforementioned complex CuBr(S(CH3)2) is widely used to generate

  • Web Elements

External links

  1. ^ a b c "NIOSH Pocket Guide to Chemical Hazards #0150".  
  2. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
  3. ^ a b This report gives a procedure for generating CuBr: Jonathan L. Hartwell (1955). "o-Chlorobromobenzene".  .
  4. ^ a b Jarowicki, K.; Kocienski, P. J.; Qun, L. "1,2-Metallate Rearrangement: (Z)-4-(2-Propenyl)-3-Octen-1-ol" Organic Syntheses, Collected Volume 10, p.662 (2004).http://www.orgsyn.org/orgsyn/pdfs/V79P0011.pdf

References

and Cu-catalyzed Cross-Dehydrogenative Couplings (CDC). Atom Transfer Radical Polymerization for catalysts Related CuBr complexes are [4]

This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.