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Compounds of strontium:
strontium (II) bromide
- Formula as commonly written: SrBr2.6H2O
- Hill system formula: Br2H12O6Sr1
- CAS registry number: [7789-53-9]
- Formula weight: 355.52
- Class: bromide
Synonyms
- strontium (II) bromide
- strontium bromide
- strontium dibromide
Physical properties
- Colour: white
- Appearance: crystalline solid
- Melting point: 180°C (dehydrates to SrBr2)
- Boiling point:
- Density:
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Element analysis and oxidation numbers
For each compound, and where possible, a formal oxidation number for each element is given, but the usefulness of this number is limited, especially so for p-block elements in particular. Based upon that oxidation number, an electronic configuration is also given but note that for more exotic compounds you should view this as a guide only.
| Element |
% |
Formal oxidation state |
Formal electronic configuration |
|
Br |
44.95 |
-1 |
[Ar].3d10.4s2.4p6 |
|
H |
3.40 |
1 |
1s0 |
|
O |
27.00 |
-2 |
[He].2s2.2p6 |
|
Sr |
24.65 |
2 |
[Kr] |
Synthesis
Pute strontium dibromide can be made on a small scale by the reaction of strontium metal in liquid ammonia with ammonium chloride.
Sr(NH3) + NH4Cl → 2SrCl2(s) + 2NH3 + H2(g)
The hexahydrate SrBr2.6H2O [7789-53-9] loses all six waters upon heating at 180°C to form anhydrous SrBr2.
Isotope pattern
What follows is the calculated isotope pattern for the SrBr2.6H2O unit with the most intense ion set to 100%.
Formula: Sr1Br2H12O6
mass %
350 0.3 351 0.0 352 6.4 ___ 353 4.1 __ 354 59.8 ______________________________ 355 8.2 ____ 356 100.0 __________________________________________________ 357 4.3 __ 358 46.8 _______________________ 359 0.2 360 0.6
References
The data on these compounds pages are assembled and adapted from the primary literature and several other sources including the following.
- R.T. Sanderson in Chemical Periodicity, Reinhold, New York, USA, 1960.
- N.N. Greenwood and A. Earnshaw in Chemistry of the Elements, 2nd edition, Butterworth, UK, 1997.
- F.A. Cotton, G. Wilkinson, C.A. Murillo, and M. Bochmann, in Advanced Inorganic Chemistry, John Wiley & Sons, 1999.
- A.F. Trotman-Dickenson, (ed.) in Comprehensive Inorganic Chemistry, Pergamon, Oxford, UK, 1973.
- R.W.G. Wyckoff, in Crystal Structures, volume 1, Interscience, John Wiley & Sons, 1963.
- A.R.West in Basic solid state chemistry Chemistry, John Wiley & Sons, 1999.
- A.F. Wells in Structural inorganic chemistry, 4th edition, Oxford, UK, 1975.
- J.D.H. Donnay, (ed.) in Crystal data determinative tables, ACA monograph number 5, American Crystallographic Association, USA, 1963.
- D.R. Lide, (ed.) in Chemical Rubber Company handbook of chemistry and physics, CRC Press, Boca Raton, Florida, USA, 77th edition, 1996.
- J.W. Mellor in A comprehensive treatise on inorganic and theoretical chemistry, volumes 1-16, Longmans, London, UK, 1922-1937.
- J.E. Macintyre (ed.) in Dictionary of inorganic compounds, volumes 1-3, Chapman & Hall, London, UK, 1992.
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