Iodine compounds: diiodine pentaoxide

iodine symbol icon

The iodine in diiodine pentaoxide formally is in the oxidation state 5.

Diiodine pentaoxide

  • Formula as often written: I2O5
  • Hill system formula: I2O5
  • CAS registry number: [12029-98-0]
  • Formula weight: 333.806
  • Class: oxide

Synonyms

  • diiodine pentaoxide
  • iodine(V) oxide
  • iodic anhydride
  • iodine oxide

Physical properties

  • Colour: white
  • Appearance: crystalline solid
  • Melting point: 300°C (decomposes to I2 + O2)
  • Boiling point:
  • Density: 4.799 (25°C)

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Element analysis

Element percentages for the elements in diiodine pentaoxide
Element %
I 76.03
O 23.97

Synthesis

Not available

Isotope pattern

What follows is the calculated isotope pattern for the I2O5 unit with the most intense ion set to 100%.

Formula: I2O5

mass  %
334 100.0 __________________________________________________
335   0.2 
336   1.0 
337   0.0 
338   0.0

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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iodine atomic number