Hydrogen selenide

Hydrogen compounds: hydrogen selenide

The hydrogen in hydrogen selenide formally is in the oxidation state 1.

Hydrogen selenide

• Formula as often written: H₂Se
• Hill system formula: H₂Se₁
• CAS registry number: [7783-07-5]
• Formula weight: 80.976
• Class: selenide

Synonyms

• hydrogen selenide
• hydrogen(I) selenide
• dihydrogen monoselenide
• dihydrogen selenide

Physical properties

• Colour: colourless
• Appearance: gas
• Melting point: -66°C
• Boiling point: -42°C
• Density: 2120 kg m^-3

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Element analysis

Element percentages for the elements in hydrogen selenide

Element	%
H	2.49
Se	97.51

Synthesis

Hydrogen selenide (danger!!) can be made in the laboratory by the direct reaction of the elements but might best be made from aluminium selenide. With considerable care, the reaction between aluminium selenide and water can be used in the laboratory to make hydrogen(II) selenide. Hydrogen(II) selenide is a colourless gas which boils at -42°C and freezes at -66°C.

Al₂Se₃ + (3 + x)H₂O → 3H₂Se + Al₂O₃.xH₂O

Solid state structure

• Geometry of hydrogen: 1 coordinate: terminus
• Prototypical structure:

Isotope pattern

What follows is the calculated isotope pattern for the H₂Se unit with the most intense ion set to 100%.

Formula: H₂Se₁

mass  %
76   1.8 _
77   0.0 
78  18.1 _________
79   1.5 _
80  47.5 ________________________
81   0.0 
82 100.0 __________________________________________________
83   0.0 
84  18.5 _________
85   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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Hydrogen	Hydrogène
Wasserstoff	Waterstof
Idrogeno	Hidrógeno
Väte	Hidrogênio