Osmium tetrabromide

Osmium compounds: osmium tetrabromide

The osmium in osmium tetrabromide formally is in the oxidation state 4.

Osmium tetrabromide

• Formula as often written: OsBr₄
• Hill system formula: Br₄Os₁
• CAS registry number: [59201-52-4]
• Formula weight: 509.846
• Class: bromide

Synonyms

• osmium tetrabromide
• osmium(IV) bromide
• osmium bromide

Physical properties

• Colour: black
• Appearance: solid
• Melting point: 350°C (decomposes to OsBr₃ + Br₂)
• Boiling point:
• Density:

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Element analysis

Element percentages for the elements in osmium tetrabromide

Element	%
Br	62.69
Os	37.31

Synthesis

Not available

Solid state structure

• Geometry of osmium:
• Prototypical structure:

Isotope pattern

What follows is the calculated isotope pattern for the OsBr₄ unit with the most intense ion set to 100%.

Formula: Os₁Br₄

mass  %
500   0.0 
501   0.0 
502   0.5 
503   0.4 
504   5.4 ___
505   6.2 ___
506  24.2 ____________
507  19.9 __________
508  62.6 _______________________________
509  27.0 ______________
510 100.0 __________________________________________________
511  16.9 ________
512  95.0 ________________________________________________
513   4.0 __
514  48.5 ________________________
515   0.0 
516  10.2 _____

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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