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Silane, tetrabromo-

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Name

Silane, tetrabromo-

EINECS 232-182-4
CAS No. 7789-66-4 Density 2.971 g/cm3
PSA 0.00000 LogP 3.00160
Solubility decomposed in water to HBr, silicic acid, with evolution of heat [MER06] Melting Point 5 °C(lit.)
Formula Br4Si Boiling Point 154 °C at 760 mmHg
Molecular Weight 347.702 Flash Point 154°C
Transport Information UN 3264 8/PG 2 Appearance N/A
Safety 26-27-28-36/37/39 Risk Codes 34
Molecular Structure Molecular Structure of 7789-66-4 (SILICON TETRABROMIDE) Hazard Symbols CorrosiveC
Synonyms

Siliconbromide (SiBr4) (6CI,8CI);Perbromosilane;Silicon bromide;Silicontetrabromide;Tetrabromosilane;Silicon bromide; Silicon bromide (SiBr4); Silicon tetrabromide;silicon tetrabromide;

Article Data 43

Silane, tetrabromo- Synthetic route

10581-00-7

phenyltribromosilane

10035-10-6, 12258-64-9

hydrogen bromide

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
With aluminum tri-bromide In benzene byproducts: PhH; 12 h, room temp.; 5-6 h, 70°C; distn.;99.4%
7440-21-3

silicon

A

4072-00-8

Diphenyldibromsilan

B

10581-00-7

phenyltribromosilane

C

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
With C6H5Br; copper In neat (no solvent) Si-Cu (8:2) and C6H5Br at about 420°C;;A 27%
B 42%
C 13%
10026-04-7, 53609-55-5

tetrachlorosilane

87-82-1

hexabromobenzene

A

7789-66-4

tetrabromosilane

B

13465-75-3

dibromo dichlorosilane

C

13465-74-2

bromo trichloro silane

D

13465-76-4

chloro tribromo silane

Conditions
ConditionsYield
In gas High Pressure; reagents added to tube in dry ice bath, sealed in amts. to develop about 30-50 atm of pressure at 300°C, heated at 310-350°C for 1.5-69 h; analyzed by GLC;

silver(I) bromide

7440-21-3

silicon

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
above m.p. of AgBr in vac.;
10035-10-6, 12258-64-9

hydrogen bromide

7440-21-3

silicon

A

7789-57-3

tribromosilane

B

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
340-360 °C;
340-360 °C;
In neat (no solvent) moderate heating of Si in a dry HBr stream;;
In neat (no solvent) heating of Si in a HBr stream below red heat;; fractional distillation;;
Cu(b),Si(10) (X%)

Cu(b),Si(10) (X%)

10035-10-6, 12258-64-9

hydrogen bromide

A

7789-57-3

tribromosilane

B

7789-66-4

tetrabromosilane

593-95-3

carbonyl dibromide

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
In neat (no solvent) byproducts: Si2OBr6, bromine, carbon monoxide; >1000 K;
Cu(20),Si(80) (X%)

Cu(20),Si(80) (X%)

10035-10-6, 12258-64-9

hydrogen bromide

A

7789-57-3

tribromosilane

B

7789-66-4

tetrabromosilane

13465-74-2

bromo trichloro silane

A

10026-04-7, 53609-55-5

tetrachlorosilane

B

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
In neat (no solvent) passing SiBrCl3 through a tube, heated at 600 °C;;
In neat (no solvent) passing SiBrCl3 through a tube, heated at 600 °C;;
13465-74-2

bromo trichloro silane

13465-76-4

chloro tribromo silane

A

10026-04-7, 53609-55-5

tetrachlorosilane

B

7789-66-4

tetrabromosilane

Conditions
ConditionsYield
In neat (no solvent) passing a mixture of SiBrCl3 and SiBr3Cl through a tube, heated at 600 °C;;
In neat (no solvent) passing a mixture of SiBrCl3 and SiBr3Cl through a tube, heated at 600 °C;;

Silane, tetrabromo- Specification

The Silane, tetrabromo-, with the CAS registry number 7789-66-4 and EINECS registry number 232-182-4, has systematic name of tetrabromosilane. It belongs to the product category of Pharmacetical. And the molecular formula of the chemical is Br4Si.

The characteristics of Silane, tetrabromo- are as followings: (1)ACD/LogP: 5.86; (2)# of Rule of 5 Violations: 1; (3)ACD/LogD (pH 5.5): 5.86; (4)ACD/LogD (pH 7.4): 5.86; (5)ACD/BCF (pH 5.5): 16712.71; (6)ACD/BCF (pH 7.4): 16712.71; (7)#H bond acceptors: 0; (8)#H bond donors: 0; (9)#Freely Rotating Bonds: 0; (10)Polar Surface Area: 0 Å2; (11)Index of Refraction: 1.631; (12)Molar Refractivity: 41.69 cm3; (13)Molar Volume: 116.9 cm3; (14)Polarizability: 16.52×10-24cm3; (15)Surface Tension: 43.1 dyne/cm; (16)Density: 2.971 g/cm3; (17)Enthalpy of Vaporization: 37.9 kJ/mol; (18)Boiling Point: 154 °C at 760 mmHg; (19)Vapour Pressure: 4.17 mmHg at 25°C.

You should be cautious while dealing with this chemical. It may cause burns. Therefore, you had better take the following instructions: Wear suitable protective clothing, gloves and eye/face protection; Take off immediately all contaminated clothing; After contact with skin, wash immediately with plenty of ... (to be specified by the manufacturer); In case of contacting with eyes, rinse immediately with plenty of water and seek medical advice.

Addtionally, the following datas could be converted into the molecular structure:
(1)SMILES: Br[Si](Br)(Br)Br
(2)InChI: InChI=1/Br4Si/c1-5(2,3)4
(3)InChIKey: AIFMYMZGQVTROK-UHFFFAOYAY

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