July 13, 2020, 04:03:51 AM
Forum Rules: Read This Before Posting


Topic: Copper (I) bromide  (Read 8220 times)

0 Members and 1 Guest are viewing this topic.

Offline alexanderdundua

  • Regular Member
  • ***
  • Posts: 20
  • Mole Snacks: +0/-0
Copper (I) bromide
« on: November 17, 2007, 11:22:27 AM »
I am searching for experimental procedure for synthesis of copper (I) bromide.
can anyone help me?

Offline CopperSmurf

  • Full Member
  • ****
  • Posts: 139
  • Mole Snacks: +6/-4
  • Gender: Male
Re: Copper (I) bromide
« Reply #1 on: November 17, 2007, 05:20:47 PM »
You could try putting some solid copper with HBr acid together.

Offline hmx9123

  • Retired Staff
  • Full Member
  • *
  • Posts: 897
  • Mole Snacks: +59/-18
Re: Copper (I) bromide
« Reply #2 on: November 18, 2007, 01:48:43 AM »
You may be able to prepare some based on selective precipitation if your compounds have the proper solubilities.  Otherwise, you can add something like HBr to a copper carbonate and then reduce with copper metal while heating the solution.

Offline Alpha-Omega

  • Full Member
  • ****
  • Posts: 693
  • Mole Snacks: +360/-231
  • Gender: Female
  • Physical Inorganic Chemist
Re: Copper (I) bromide
« Reply #3 on: December 31, 2007, 06:12:07 PM »
TYPICAL PREP FOR CUPROUS BROMIDE


Cuprous bromide can be prepared by dissolving 600 g. (2.4 moles) of commercial copper sulfate crystals and 350 g. (3.4 moles) of sodium bromide in 2 l. of warm water; the solution must be stirred while 151 g. (1.2 moles) of solid sodium sulfite are added over a period of 10 minutes.

Occasionally a little more sodium sulfite may be required to discharge the blue color. The mixture must be  cooled, and the solid collected on an 8-in. B├╝chner funnel, washed once with water, pressed nearly dry, and then dried in the air overnight. The yield of cuprous bromide should be approximatly 320 g. (93%).

Additionally,Cuprous bromide can be generated by dissolving copper powder in hydrobromic acid:

2 HBr + 2 Cu → 2 CuBr + H2

The CuBr, copper(I)  bromide salts are produced by boiling an acidic solution of copper(II) ions in an excess of copper. Upon dilution, pale yellowCuBr is produced.

CuBr is a diamagnitic solid which adopts a polymeric structure similar to zinc sulfide (four-coordinated, tetrahedral Cu centers interconnected by bromide ligands).  CuBr is often used in the synthesis of organic compounds.

The method used to prepare the salt depends upon the solubility of the salt.  Since all acids are aqueous solutions the acid needed does not effect the method of preparation.


Offline CopperSmurf

  • Full Member
  • ****
  • Posts: 139
  • Mole Snacks: +6/-4
  • Gender: Male
Re: Copper (I) bromide
« Reply #4 on: March 04, 2008, 04:50:12 PM »
that's really cool. I never knew that CuBr could have a polymeric structure. As for ZnS, lol did that last month :-p , looked funny tho.

Sponsored Links