Beryllium bromide

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Beryllium bromide
Beryllium bromide.svg
Identifiers
CAS number 7787-46-4 N
PubChem 82230
ChemSpider 74208 YesY
Jmol-3D images Image 1
Properties
Molecular formula BeBr2
Molar mass 168.820 g/mol
Appearance colorless white crystals
Density 3.465 g/cm3 (20 °C)
Melting point 508 °C (946 °F; 781 K)sublimes at 473 °C (883 °F; 746 K)
Boiling point 520 °C (968 °F; 793 K)[1]
Solubility in water Highly[1]
Solubility soluble in ethanol, diethyl ether, pyridine
insoluble in benzene
Structure
Crystal structure Orthorhombic
Thermochemistry
0.4111 J/g K
9.5395 J/K
-2.094 kJ/g
Hazards
Main hazards see Berylliosis
Related compounds
Other anions Beryllium fluoride
Beryllium chloride
Beryllium iodide
Other cations Magnesium bromide
Calcium bromide
Strontium bromide
Barium bromide
Radium bromide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Beryllium bromide is the chemical compound with the formula BeBr2. It is very hygroscopic and dissolves well in water. The compound is a polymer with tetrahedral Be centres.[2]

Preparation and reactions[edit]

It can be prepared by reacting beryllium metal with elemental bromine at temperatures of 500 °C to 700 °C:[1]

Be + Br2 → BeBr2

Beryllium bromide is also formed when treating beryllium oxide with hydrobromic acid:

BeO + 2 HBr → BeBr2 + H2O

It hydrolizes slowly in water: BeBr2 + 2 H2O → 2 HBr + Be(OH)2

Safety[edit]

Beryllium compounds are toxic if inhaled or ingested.

References[edit]

  1. ^ a b c Perry, Dale L.; Phillips, Sidney L. (1995), Handbook of Inorganic Compounds, CRC Press, pp. 61–62, ISBN 0-8493-8671-3, retrieved 2007-12-10 
  2. ^ Crystal modifications of Beryllium dihalides BeCl2, BeBr2, and BeI2 Troyanov, S. I. Zhurnal Neorganicheskoi Khimii (2000), 45(10), 1619-1624.