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| CAS No.: | 10294-33-4 |
|---|---|
| Name: | Boron tribromide |
| Molecular Structure: | |
|
|
|
| Formula: | BBr3 |
| Molecular Weight: | 250.523 |
| Synonyms: | Boronbromide (BBr3) (8CI);Boron bromide;Boron(III) bromide;Tribromoborane;Tribromoboron;Borane, tribromo-; |
| EINECS: | 233-657-9 |
| Density: | 2.782 g/cm3 |
| Melting Point: | -46 °C(lit.) |
| Boiling Point: | 91.3 °C at 760 mmHg |
| Flash Point: | 30°F |
| Solubility: | Reacts with water. |
| Appearance: | clear to amber liquid with a pungent odour |
| Hazard Symbols: |
 T+,  C,  F,  N
|
| Risk Codes: | 14-26/28-35-40-62-11-67-65-50/53 |
| Safety: | 9-26-28-36/37/39-45-23-33-16-62-61-60 |
| Transport Information: | UN 3390 6.1/PG 1 |
| PSA: | 0.00000 |
| LogP: | 2.15600 |
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| Conditions | Yield |
|---|---|
| In neat (no solvent) Teflon-valve-equipped standard vacuum line or a nitrogen-filled glovebox;excess B5H9;pentaborane, B2Br4 separately condensed in the reactor, after 20 min at room temp., vessel cooled to -10 ° C,; over course of the following 10 h,all volatile material removed,reactor warmed to room temp.,all volatile material at room temp. were removed,BBr2B5H8 extd. with CH2Cl2, yield:80% on basis of amt. of B2Br4 employed, 86% on basis of unrecovered B5H9; | A 80% B n/a C n/a |
| Conditions | Yield |
|---|---|
| boron is mixed with ca. 9 w % Mg, in H2 atmosphere; | 70% |
| In not given kept over liq. Hg for 48 h; distd. (vac., room temp.); | 57.6% |
| at red heat; in H2 atmosphere; | 40% |
| Conditions | Yield |
|---|---|
| with excess of BF3; addn. of Al to depress formation of Br2; addn. of Hg to get rid of Br2; | 70% |
| with excess of BF3; addn. of Al to depress formation of Br2; addn. of Hg to get rid of Br2; | 70% |
- 10294-33-4
boron tribromide
| Conditions | Yield |
|---|---|
| In neat (no solvent) byproducts: o-CH3C6H4NO2; decompn. reaction immediately; | 50% |
- 10294-33-4
boron tribromide
| Conditions | Yield |
|---|---|
| In neat (no solvent) byproducts: C6H5NO2; decompn. reaction immediately; | 50% |
- 14355-29-4
diboron tetrabromide
- 353-54-8
tribromofluoromethane
A
- 12589-31-0
closo-B9Br9
B
- 7637-07-2
boron trifluoride
C
- 10294-33-4
boron tribromide
D
- 13965-73-6
diboron tetrafluoride
| Conditions | Yield |
|---|---|
| B2Br4 and CFBr3 were reacted in a NMR-tube at ambient temp. for 3,75 h; products detected by (19)F- and (11)B-NMR, CBr4 by (13)C-NMR; | A 2% B 7% C 2% D 39% |
| Conditions | Yield |
|---|---|
| 30% | |
| 30% |
- 856317-96-9
BBr3*Cl3CCOOC2H5
- 10294-33-4
boron tribromide
| Conditions | Yield |
|---|---|
| In neat (no solvent) byproducts: Cl3CCOOC2H5; decompn. reaction immediately; | 25% |
| Conditions | Yield |
|---|---|
| Vac.-distn. of B2Br4 to CBr4, heating in an oil-bath (96°C, 5.75 h).; Monitored by (11)B-NMR.; | 8.6% |
| Conditions | Yield |
|---|---|
| heating of B2S3 in Br2 vapour; |
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- Total:30 Page 1 of 1 1
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Chemistry
MF: BBr3
MW: 250.52
mp : -46 °C(lit.)
bp : -90 °C
density : 2.60 g/mL at 20 °C(lit.)
vapor density : 8.6 (vs air)
vapor pressure : 40 mm Hg ( 14 °C)
Fp : 30 °F
storage temp. : Poison room
color : colorless
Sensitive : Moisture Sensitive
IUPAC Name: tribromoborane
Storage temp: Poison room
Sensitive: Moisture Sensitive
Stability: Stable, but reacts violently with water
Appearance: clear to amber liquid with a pungent odour
Product Categories: Inorganics;Piperazine derivates;Deprotecting Reagents;Others;Protection and Derivatization
Synonyms of Boron tribromide (10294-33-4): BBr3 ; Borane,tribromo- ; Boron,tribromo- ; boronbromide(bbr3) ; tribromo-boran ; tribromoborane ; tribromoboron ; tribromo-Boron
Molecular Structure of Boron tribromide (10294-33-4):
Boron tribromide (10294-33-4) is commercially available and is a strong Lewis acid. It is an excellent demethylating or dealkylating agent for ethers, often in the production of pharmaceuticals. Additionally, it also finds applications in olefin polymerization and in Friedel-Crafts chemistry as a Lewis acid catalyst. The electronics industry uses boron tribromide as a boron source in pre-deposition processes for doping in the manufacture of semiconductors.
Uses
Boron tribromide (10294-33-4) is used as intermingle source in semiconductor silicon; extracting high-purity boron and organic boron compound; a source in optical fibre.
Production
The first synthesis was done by M. Poggiale in 1846 by reacting boron trioxide with carbon and bromine at high temperatures:
B2O3 + 3 C + 3 Br2 → 2 BBr3 + 3 CO
An improvement of this method was developed by F. W?hler and Deville in 1857. By starting from amorphous boron the reaction temperatures are lower and no carbon monoxide is produced
2 B + 3 Br2 → 2 BBr3
Toxicity Data With Reference
RTECS#: CAS# 142-82-5: MI7700000
CAS# 10294-33-4: ED7400000
LD50/LC50: RTECS:
CAS# 142-82-5: Inhalation, rat: LC50 = 103 gm/m3/4H;
RTECS:
CAS# 10294-33-4:.
Carcinogenicity: Heptane (n-) - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Boron tribromide (10294-33-4) - Not listed as a carcinogen by ACGIH, IARC, NTP, or CA Prop 65.
Other: See actual entry in RTECS for complete information.
Safety Profile
Hazard Codes:
T+
C
F
N
Risk Statements: 14-26/28-35-40-62-11-67-65-50/53
R14: Reacts violently with water
R26/28: Very toxic by inhalation and if swallowed
R35: Causes severe burns
R40: Limited evidence of a carcinogenic effect
R62: Risk of impaired fertility
R11: Highly flammable
R67: Vapours may cause drowsiness and dizziness
R65: Harmful: may cause lung damage if swallowed
R50/53: Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment
Safety Statements: 9-26-28-36/37/39-45-23-33-16-62-61-60
S9: Keep container in a well-ventilated place
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
S28: After contact with skin, wash immediately with plenty of soap-suds
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
S23: Do not breathe vapour
S33: Take precautionary measures against static discharges
S16: Keep away from sources of ignition
S62: If swallowed, do not induce vomitting; seek medical advice immediately and show this container or label
S61: Avoid release to the environment. Refer to special instructions / safety data sheets
S60: This material and its container must be disposed of as hazardous waste
RIDADR: UN 3390 6.1/PG 1
WGK Germany: 3
RTECS: ED7400000
F: 10-21
HazardClass: 8
PackingGroup: I
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