Silicon tetraiodide

The ionization of silicon tetraiodide by pyridine has been mentioned above. Trichlorosilane is known to undergo ionization with amines in solution of acetonitrile 39) ... 

Tetraethoxysilane can be obtained not only from SiCl4, but also from SiBr4 and SiF4. Silicon tetraiodide Sil4 is not advisable, since in this case... 

Protactinium pentaiodide was first prepared by reacting the pentox-ide with aluminum triiodide at 400°C in a vacuum (104). For large scale preparations, however, direct union of the elements or metathesis of the pentaohloride or pentabromide with an excess of silicon tetraiodide are best (40). The latter reactions take place rapidly at about 180°C in vacuo and the black crystalline product is then purified by vacuum sublimation at 400°-450°C. Silicon tetraiodide also reacts with protactinium pent-oxide, but temperatures in excess of 600°C are required with the reaction vessel completely enclosed in the furnace, and the yield is only about 70% (40). 

Silicon Tetraiodide - 285-300 140-149 G - - - plus 2 percent free iodine under reflux half immersed... 

There is no modern structural information for silicon tetraiodide, so its structure has now been determined by electron diffraction at 378 K. " It is, of course, regularly tetrahedral, and the Si-I bond distance (rg) was determined to be 243.2(5) pm. The non-bonded T T distance refined to 397.1(8) pm. These two distances indicate that there is a very small shrinkage correction in this case. 

Chlorine Trifluoride Tech. Bull. , Morristown, Baker Adamson, 1970 Incandescence is caused by contact with bromine, iodine, arsenic, antimony (even at -10°C) powdered molybdenum, niobium, tantalum, titanium, vanadium boron, carbon, phosphorus or sulfur [1], Carbon tetraiodide, chloromethane, benzene or ether ignite or explode on contact, as do organic materials generally. Silicon also ignites [2],... 

The ease with which the tetrahalides dissociate thermally increases rapidly in the series from tetrafluoride to tetraiodide. While the chlorine-silicon bond ordinarily is not considered mobile, it undergoes an interesting redistribution reaction with the isocyanate bond in the preparation of chloroisocyanates of silicon.18... 

Oxidizer, Poison, Corrosive SAFETY PROFILE Poisonous and corrosive. Very reactive, a powerful oxidizer. Explosive or violent reaction with organic materials, water, acetone, ammonium halides, antimony, antimony trichloride oxide, arsenic, benzene, boron, bromine, carbon, carbon monoxide, carbon tetrachloride, carbon tetraiodide, chloromethane, cobalt, ether, halogens, iodine, powdered molybdenum, niobium, 2-pentanone, phosphoms, potassium hexachloroplatinate, pyridine, silicon, silicone grease, sulfur, tantalum, tin dichloride, titanium, toluene, vanadium, uranium, uranium hexafluoride. 

Si02[CR] SILICON DIOXIDE (CRISTOBALITE) 1506 Snl4[g] TIN TETRAIODIDE (GAS) 1548... 

In an attempt to prepare (C3F7)4Si, silicon tetrachloride was treated with the lithium alloy and heptafluoro-n-propyl iodide. Hexafluoropropene and a mixture of fluorosilanes, (C3F7),SiF4, j, were formed. A similar reaction with tin tetrachloride led to formation of tin tetraiodide, very probably by... 

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