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Si + 2 Cl 2 → SiCl 4. It was first prepared by Jöns Jakob Berzelius in 1823. [4] Brine can be contaminated with silica when the production of chlorine is a byproduct of a metal refining process from metal chloride ore. In rare occurrences, the silicon dioxide in silica is converted to silicon tetrachloride when the contaminated brine is ...
Valence shell electron pair repulsion (VSEPR) theory (/ ˈ v ɛ s p ər, v ə ˈ s ɛ p ər / VESP-ər, [1]: 410 və-SEP-ər [2]) is a model used in chemistry to predict the geometry of individual molecules from the number of electron pairs surrounding their central atoms. [3]
2 Structure and properties. 3 Thermodynamic properties. 4 Spectral data. 5 References. Toggle the table of contents. Silicon tetrachloride (data page) 1 language.
According to VSEPR theory, T-shaped geometry results when three ligands and two lone pairs of electrons are bonded to the central atom, written in AXE notation as AX 3 E 2. The T-shaped geometry is related to the trigonal bipyramidal molecular geometry for AX 5 molecules with three equatorial and two axial ligands.
Si + 3 HCl → HCl 3 Si + H 2. Yields of 80-90% can be achieved. The main byproducts are silicon tetrachloride (chemical formula SiCl 4), hexachlorodisilane (Si 2 Cl 6) and dichlorosilane (H 2 SiCl 2), from which trichlorosilane can be separated by distillation. Tank car of trichlorosilane. UN number: 2988 (Chlorosilanes).
2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a polychlorinated dibenzo-p-dioxin (sometimes shortened, though inaccurately, to simply 'dioxin') [3] with the chemical formula C 12 H 4 Cl 4 O 2. Pure TCDD is a colorless solid with no distinguishable odor at room temperature.