9754. Trisilane

Nomenclature

CAS number: 7783-26-8
Trisilicopropane; trisilicon octahydride; silicopropane; trisilicane.
H8Si3; mol wt 92.32.
H 8.73%, Si 91.27%.
Si3H8.

Description and references

Obtained by separation of mixed silanes prepared from magnesium silicide and hydrochloric acid: Stock, Somiesky, Ber. 49, 111 (1916); 54B, 524 (1921); 56B, 247 (1923); Culbertson, US 2551571 (1951 to Union Carbide); prepared by conversion of silane to higher silanes in an ozonizer type of electric discharge: Spanier, MacDiarmid, Inorg. Chem. 1, 432 (1962).

Properties

Liquid. mp 117.4°; bp 52.9°; d0 0.743; vapor pressure 95.5 mm Hg at 0°. Much less stable than silane or disilane. Detonates in air. Dec in water. Reacts vigorously with CCl4 and CHCl3.