|
|
Hydrogen compounds: hydrogen iodide
The hydrogen in hydrogen iodide formally is in the oxidation state 1.
Hydrogen iodide
- Formula as often written: HI
- Hill system formula: H1I1
- CAS registry number: [10034-85-2]
- Formula weight: 127.912
- Class: iodide
Synonyms
- hydrogen iodide
- hydrogen(I) iodide
- hydroiodic acid
Physical properties
- Colour: colourless
- Appearance: gas
- Melting point: -51°C
- Boiling point: -35°C
- Density: 2850 kg m-3 (-47°C); 6.613 kg m-3 (gas)
Suppliers
Coming soon...
Element analysis
Element percentages for the elements in hydrogen iodide
| Element |
% |
| H |
0.79 |
| I |
99.21 |
Synthesis
Hydrogen iodide may be made in the laboratory by the reaction between purified hydrogen gas and iodine. This is catalyzed by platinized asbestos.
I2 + H2 [Pt] → 2HI
Less desirable in the laboratory, but a process used commercially, is the reaction between hydrogen sulphide, H2S (danger!) and iodine.
8I2 + 8H2S → 16HI + S8
Solid state structure
- Geometry of hydrogen: 1 coordinate: terminus
- Prototypical structure:
Isotope pattern
What follows is the calculated isotope pattern for the HI unit with the most intense ion set to 100%.
Formula: H1I1
mass %
128 100.0 __________________________________________________
129 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.
|
|
Hydrogen
Hydrogène
Wasserstoff
Waterstof
Idrogeno
Hidrógeno
Väte
Hidrogênio