Disilane

Disilane
Structural formula of disilane
Structural formula of disilane
Spacefill model of disilane
Spacefill model of disilane
Names
IUPAC name
Disilane
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.014.970 Edit this at Wikidata
368
UNII
  • InChI=1S/H6Si2/c1-2/h1-2H3 checkY
    Key: PZPGRFITIJYNEJ-UHFFFAOYSA-N checkY
  • InChI=1/H6Si2/c1-2/h1-2H3
    Key: PZPGRFITIJYNEJ-UHFFFAOYAQ
  • [SiH3][SiH3]
Properties
Si2H6
Molar mass 62.218 g·mol−1
Appearance Colourless gas
Density 2.7 g dm−3
Melting point −132 °C (−206 °F; 141 K)
Boiling point −14 °C (7 °F; 259 K)
Reacts[1]
Vapor pressure 2940.2±0.0 mmHg at 25°C[2]
Conjugate acid Disilanium
Structure
0 D
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Extremely flammable
Related compounds
Related disilanes
 Hexamethyldisilane
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Disilane is a chemical compound with chemical formula Si2H6 that was identified in 1902 by Henri Moissan and Samuel Smiles (1877–1953). Moissan and Smiles reported disilane as being among the products formed by the action of dilute acids on metal silicides. Although these reactions had been previously investigated by Friedrich Woehler and Heinrich Buff between 1857 and 1858, Moissan and Smiles were the first to explicitly identify disilane. They referred to disilane as silicoethane. Higher members of the homologous series SinH2n+2 formed in these reactions were subsequently identified by Carl Somiesky (sometimes spelled "Karl Somieski") and Alfred Stock.

At standard temperature and pressure, disilane is a colourless, acrid gas. Disilane and ethane have similar structures, although disilane is much more reactive. Other compounds of the general formula Si2X6 (X = hydrogen, halogen, alkyl, aryl, and mixtures of these groups) are called disilanes. Disilane is a group 14 hydride.

  1. ^ John Rumble (June 18, 2018). CRC Handbook of Chemistry and Physics (99th ed.). CRC Press. pp. 4–47. ISBN 978-1138561632.
  2. ^ "Disilane CAS#:1590-87-0".