3,14-Dioxa-8,9-dithia-4,13-disilahexadecane, 4,4,13,13-tetraethoxy- → 4,4,15,15-Tetraethoxy-3,16-dioxa-8,9,10,11-tetrathia-4,15-disilaoctadecane

Participants

Reaction Steps

47.5 g of bis-[γ-(triethoxysilyl)-propyl]-disulfide (0.1 mole) was heated together with 6.2 g of sulfur (0.2 mole) in a nitrogen gas atmosphere for about 50 hours at 160°C, until all of the sulfur had gone into solution and did not crystallize out again when the solution was cooled. A dark red, viscous solution was formed, which a thin-layer chromatograph shows to contain no more free sulfur, and which, according to mass spectrometric analysis, contains a small amount of pentasulfide in addition to disulfides and trisulfides.

Provenance & Evidence