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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).
The bond angle for water is 104.5°. 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]
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 ...
4 HCl + Mg 2 Si → SiH 4 + 2 MgCl 2 In general, the alkaline-earth metals form silicides with the following stoichiometries : M II 2 Si , M II Si , and M II Si 2 . In all cases, these substances react with Brønsted–Lowry acids to produce some type of hydride of silicon that is dependent on the Si anion connectivity in the silicide.
Download as PDF; Printable version; In other projects Wikidata item; Appearance. move to sidebar hide ... −87.5 Viscosity: 99.4 mPa.s at 25 °C 96.2 mPa.s at 50 °C
The geometry is common for certain main group compounds that have a stereochemically-active lone pair, as described by VSEPR theory. Certain compounds crystallize in both the trigonal bipyramidal and the square pyramidal structures, notably [Ni(CN) 5] 3−. [1]
The T-shaped geometry is related to the trigonal bipyramidal molecular geometry for AX 5 molecules with three equatorial and two axial ligands. In an AX 3 E 2 molecule, the two lone pairs occupy two equatorial positions, and the three ligand atoms occupy the two axial positions as well as one equatorial position. The three atoms bond at 90 ...
Square prismatic geometry (D 4h) is much less common compared to the square antiprism.An example of a molecular species with square prismatic geometry (a slightly flattened cube) is octafluoroprotactinate(V), [PaF 8] 3–, as found in its sodium salt, Na 3 PaF 8. [6]