Mercury(I) bromide

Mercury(I) bromide
Mercury(I) bromide
Identifiers
CAS number 15385-58-7
RTECS number  ?
Properties
Molecular formula Hg2Br2
Molar mass 560.99 g/mol
Appearance white tetragonal crystals
Density 7.307 g/cm³, solid
Melting point

405°C

Boiling point

sublimes at 340-350°C [1]

Solubility in water 3.9 x 10-5 g/100 mL
Structure
Molecular shape linear
Hazards
EU classification Very toxic (T+)
Dangerous for
the environment (N)
R-phrases R26/27/28, R33, R50/53
S-phrases S13, S28, S45, S60, S61[2]
Flash point non-flammable
Related compounds
Other anions Mercury(I) fluoride
Mercury(I) chloride
Mercury(I) iodide
Other cations Zinc bromide
Cadmium bromide
Mercury(II) bromide
 YesY bromide (verify) (what is: YesY/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Mercury(I) bromide or mercurous bromide is the chemical compound composed of mercury and bromine with the formula Hg2Br2. It changes color from white to yellow when heated[1] and fluoresces orange when exposed to ultraviolet light. It has applications in acousto-optical devices.[3]

A very rare mineral form is called kuzminite, Hg2(Br,Cl)2.

Reactions

Mercury(I) bromide is prepared by the oxidation of elemental mercury with elemental bromine or by adding sodium bromide to a solution of mercury(I) nitrate[1]. It decomposes to mercury(II) bromide and elemental mercury[when?][3].

Structure

In common with other Hg(I) (mercurous) compounds which contain linear X-Hg-Hg-X units, Hg2Br2 contains linear BrHg2Br units with an Hg-Hg bond length of 249 pm (Hg-Hg in the metal is 300 pm) and an Hg-Br bond length of 271 pm.[4] The overall coordination of each Hg atom is octahedral as, in addition to the two nearest neighbours, there are four other Br atoms at 332 pm.[4] The compound is often formulated as Hg22+ 2Br.[5]

References

  1. ^ a b c Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 255, ISBN 0849386713, http://books.google.com/?id=0fT4wfhF1AsC&pg=PA255&dq=%22Mercury(I)+bromide%22, retrieved 2008-05-30 
  2. ^ "483230 Mercury(I) bromide 99.9+ %". Sigma-Aldrich. http://www.sigmaaldrich.com/catalog/search/ProductDetail/ALDRICH/483230. Retrieved 2008-05-30. 
  3. ^ a b Macintyre, Jane Elizabeth; Daniel, F. M.; Stirling, V. M. (1992), Dictionary of Inorganic Compounds, 1, CRC Press, pp. 314, ISBN 0412301202, http://books.google.com/?id=YmBiXJ7qRtAC&pg=PA314&dq=Mercury(I)+bromide, retrieved 2008-05-30 
  4. ^ a b Wells A.F. (1984) Structural Inorganic Chemistry 5th edition Oxford Science Publications ISBN 0-19-855370-6
  5. ^ Cotton, F. Albert; Wilkinson, Geoffrey; Murillo, Carlos A.; Bochmann, Manfred (1999), Advanced Inorganic Chemistry (6th ed.), New York: Wiley-Interscience, ISBN 0-471-19957-5 

Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • Mercury(II) bromide — IUPAC name Mercury(II) bromide …   Wikipedia

  • mercury(II) bromide — gyvsidabrio(II) bromidas statusas T sritis chemija formulė HgBr₂ atitikmenys: angl. mercuric bromide; mercury(II) bromide rus. ртути(II) бромид; ртуть двубромистая ryšiai: sinonimas – gyvsidabrio dibromidas …   Chemijos terminų aiškinamasis žodynas

  • Mercury bromide — can refer to: Mercury(I) bromide (mercurous bromide), Hg2Br2 Mercury(II) bromide (mercuric bromide), HgBr2 This disambiguation page lists articles associated with the same title. If an …   Wikipedia

  • Mercury(II) chloride — Mercury(II) chloride …   Wikipedia

  • Mercury(I) chloride — Mercury(I) chloride …   Wikipedia

  • Mercury(II) iodide — (α form) Mercury(II) iodide (β form) …   Wikipedia

  • Mercury(I) nitrate — Mercury(I) nitrate[1][2] …   Wikipedia

  • Mercury(I) fluoride — IUPAC name Mercury(I) fluoride …   Wikipedia

  • Mercury(I) sulfate — IUPAC name Mercury(I) sulfate Other names Mercurous sulf …   Wikipedia

  • Mercury(II) fluoride — IUPAC name Mercury(II) fluoride …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”