8498. Silicon Tetraacetate

Nomenclature

CAS number: 562-90-3
Acetic acid tetraanhydride with silicic acid (H4SiO4); tetraacetoxysilane; tetrakis(acetyloxy)silane.
C8H12O8Si; mol wt 264.26.
C 36.36%, H 4.58%, O 48.44%, Si 10.63%.

Description and references

Prepd from SiCl4 + (CH3CO)2O: Balthis, Inorg. Synth. 4, 45 (1953).

Chemical structure

Properties

Extremely hygroscopic cryst mass. Hydrolyzed rapidly by moist air. mp 110°. Dec at 160-170° with evolution of acetic anhydride. bp6.0 148°. Violent reaction on contact with water. Forms SiO2 and ethyl acetate on contact with alcohol. Moderately sol in acetone, benzene.