7789-66-4 Usage
Description
Silicon tetrabromide (SiBr4) is a fuming, colorless liquid that turns yellow when exposed to air and has a disagreeable odor. It is a noncombustible compound that decomposes upon contact with water, releasing heat. Silicon tetrabromide is a significant chemical compound with various applications across different industries.
Uses
Used in Photoluminescent Silicon Nanocrystals Production:
Silicon tetrabromide is used as a precursor in the production of photoluminescent silicon nanocrystals. The application reason is that it can be chemically reduced with alkaline metals, which results in the formation of these nanocrystals.
In the Electronics Industry:
Silicon tetrabromide is used as a chemical precursor for the synthesis of photoluminescent silicon nanocrystals, which are essential components in the development of advanced electronic devices and materials. The application reason is that these nanocrystals exhibit unique optical and electronic properties that can be harnessed for various applications, such as light-emitting diodes (LEDs), solar cells, and sensors.
In the Research and Development Sector:
Silicon tetrabromide is used as a key compound in the research and development of new materials and technologies related to silicon nanocrystals. The application reason is that its chemical properties and reactivity make it a valuable tool for exploring novel applications and understanding the fundamental properties of these materials.
In the Chemical Industry:
Silicon tetrabromide is used as an intermediate in the synthesis of various chemical compounds and materials. The application reason is its unique chemical properties, which allow it to be used in the production of a wide range of products, including specialty chemicals, pharmaceuticals, and materials for various industrial applications.
Hazard
Strong irritant to tissue.
Check Digit Verification of cas no
The CAS Registry Mumber 7789-66-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 7,7,8 and 9 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 7789-66:
(6*7)+(5*7)+(4*8)+(3*9)+(2*6)+(1*6)=154
154 % 10 = 4
So 7789-66-4 is a valid CAS Registry Number.
InChI:InChI=1/4BrH.H4Si/h4*1H;1H4/p-4
7789-66-4Relevant articles and documents
A simple synthesis of tetrabromosilane
Horn, Hans-Georg,Kuczkowiak, Dirk
, p. 1083 - 1084 (1996)
We report on a synthesis of SiBr4 by reacting C6H5SiBr3 with HBr/AlBr3 to give a nearly quantitative yield. We start from C6H5SiCl3 which gives C6H5SiH3 with LiAlH4 and further on C6H5SiBr3 with Br2. Johann Ambrosius Barth 1996.
Silicon Tetrakis(trifluoromethanesulfonate): A Simple Neutral Silane Acting as a Soft and Hard Lewis Superacid
Driess, Matthias,Hermannsdorfer, André
supporting information, p. 13656 - 13660 (2021/05/03)
A facile synthesis and isolation of pristine silicon tetrakis(trifluoromethanesulfonate), Si(OTf)4, is reported, acting as the first neutral silicon-based Lewis superacid suitable towards soft and hard Lewis bases. Its OTf groups have a dual function: they are excellent leaving groups and modulate the degree of reactivity towards soft and hard Lewis bases. Exposed to soft Lewis donors, Si(OTf)4 leads to [L2Si(OTf)4] complexes (L=isocyanide, thioether and carbonyl compounds) with retention of all Si?OTf bonds. In contrast, it can cleave C?X bonds (X=F, Cl) of hard organic Lewis bases with a high tendency to form SiX4 (X=F, Cl) after halide/triflate exchange. Most notable, Si(OTf)4 allows a gentle oxydefluorination of mono- and bis(trifluoromethyl)benzenes, resulting in the formation of the corresponding benzoylium species, which are stabilized by the weakly coordinating [Si(OTf)6] dianion.
Reaction of Silicon Difluoride with Halogens: a Reinvestigation
Suresh, Bettadapura S.,Thompson, James Charlton
, p. 1123 - 1126 (2007/10/02)
Reactions of SiF2 with halogens have been reinvestigated by both co-condensation and gas-phase methods.The co-condensation method yields a number of fluorohalogenosilanes including mono-, di-, and higher silane derivatives.These compounds contain SiF, SiF2, and SiF3 units.The reactivity towards SiF2 decreases from chlorine through bromine to iodine.While chlorine and bromine give rise to a number of fluorohalogenosilanes, iodine yields only the monosilane derivatives.In contrast, the gas-phase reaction do not progress to any appreciable extent.The products have been characterized by mass spectrometry and 19F and 29Si n.m.r. spectroscopy.Many have been identified for the first time.