Heptaosmium uneicosacarbonyl

Osmium compounds: heptaosmium uneicosacarbonyl

The osmium in heptaosmium uneicosacarbonyl formally is in the oxidation state 0.

Heptaosmium uneicosacarbonyl

• Formula as often written: Os₇(CO)₂₁
• Hill system formula: C₂₁O₂₁Os₇
• CAS registry number: [59158-84-8]
• Formula weight: 1919.822
• Class: carbonyl complex organometallic

Synonyms

• heptaosmium uneicosacarbonyl
• osmium(O) carbonyl
• aosmium uneicosacarbonyl
• heptaaosmium 21 carbonyl
• osmium carbonyl

Physical properties

• Colour: orange-brown
• Appearance: crystalline solid
• Melting point:
• Boiling point:
• Density:

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Element analysis

Element percentages for the elements in heptaosmium uneicosacarbonyl

Element	%
C	13.14
O	17.50
Os	69.36

Synthesis

Not available

Isotope pattern

What follows is the calculated isotope pattern for the Os₇(CO)₂₁ unit with the most intense ion set to 100%.

Formula: Os₇C₂₁O₂₁

mass  %
1903   0.1 
1904   0.1 
1905   0.3 
1906   0.5 
1907   1.2 _
1908   2.3 _
1909   4.1 __
1910   7.1 ____
1911  11.4 ______
1912  17.6 _________
1913  25.6 _____________
1914  35.9 __________________
1915  47.5 ________________________
1916  60.8 ______________________________
1917  73.0 ____________________________________
1918  85.6 ___________________________________________
1919  93.1 _______________________________________________
1920 100.0 __________________________________________________
1921  97.9 _________________________________________________
1922  96.7 ________________________________________________
1923  83.8 __________________________________________
1924  76.8 ______________________________________
1925  57.1 _____________________________
1926  49.3 _________________________
1927  29.8 _______________
1928  25.2 _____________
1929  10.6 _____
1930  10.0 _____
1931   2.4 _
1932   2.2 _
1933   0.5 
1934   0.2 

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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