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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).
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 ...
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 ...
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.
The seesaw geometry occurs when a molecule has a steric number of 5, with the central atom being bonded to 4 other atoms and 1 lone pair (AX 4 E 1 in AXE notation). An atom bonded to 5 other atoms (and no lone pairs) forms a trigonal bipyramid with two axial and three equatorial positions, but in the seesaw geometry one of the atoms is replaced ...
Two true capped square antiprismatic compounds are [Pr(terpy)Cl 3 (H 2 O) 5]·3H 2 O and [Th(Tropolon) 4 (H 2 O)]. Two geometries for steric number 10 are bicapped dodecahedral and bicapped square antiprismatic, and a geometry for steric number 14 (occurs in [An(BH 4) 4], An = Th, Pa, or U) is bicapped hexagonal antiprismatic (Holleman & Wiberg ...
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This shape is found when there are four bonds all on one central atom, with no extra unshared electron pairs. In accordance with the VSEPR (valence-shell electron pair repulsion theory), the bond angles between the electron bonds are arccos (− 1 / 3 ) = 109.47°.