|
Atomistry » Silicon » Chemical Properties » Silicothio-urea | ||
Atomistry » Silicon » Chemical Properties » Silicothio-urea » |
Silicothio-urea, SiS(NH2)2
Silicothio-urea, SiS(NH2)2, is formed by the action of ammonia on silicon thiobromide by a reaction analogous to that by which the corresponding carbon compound is formed:
SiSBr2 + 4NH3 = SiS(NH2)2 + 2NH4Br. Silico-urea is not known, for no simple silicon oxyhalide, SiOX2, exists from which it could be prepared. Silicothio-urea differs from its carbon analogue in being decomposed by water; hence the reaction for its preparation is carried out in anhydrous solution, as follows: Silicon thiobromide is dissolved in benzene, and dry ammonia is passed into the solution at low temperature, when silicothio-urea separates, together with ammonium bromide. Liquid ammonia is employed to dissolve the latter, and the silicothio-urea then remains as a white powder, which slowly decomposes at atmospheric temperature, evolving ammonia and hydrogen sulphide. Water hydrolyses this compound into silicic acid, ammonia, and hydrogen sulphide. It possesses feebly basic properties, and forms salts with the halogen hydracids. |
Last articlesTb in 6TVYSi in 6Y7O Rh in 6WRM Rh in 6WRL Ni in 6Y8Z Ni in 6Y8Y Na in 6ZXZ Na in 7ACG Na in 6YLS Na in 6Y8Z |
© Copyright 2008-2020 by atomistry.com | ||
Home | Site Map | Copyright | Contact us | Privacy |