Boron tribromide
An inorganic compound, BBr3, 250.524 g/mol. Boiling point 91.3 °C, melting point -46 °C, as published.
Identifiers
- Molecular formula
- BBr₃
- Molecular weight
- 250.524 g/mol
- Exact mass
- 247.764317 g/mol
- IUPAC name
- tribromoborane
- BrB(Br)Br
- InChI=1S/BBr3/c2-1(3)4
- ILAHWRKJUDSMFH-UHFFFAOYSA-N
Measured properties
- Boiling Point
- 196 °F at 760 mmHg (USCG, 1999)
- 91.3 °C
- Melting Point
- -51 °F (USCG, 1999)
- -46 °C
- Density
- 2.645 at 68 °F (USCG, 1999) - Denser than water; will sink
- 2.6 g/cu cm
- Solubility
- Decomposes (NIOSH, 2024)
- Soluble in carbon tetrachloride, sulfur dioxide (liquid), sulfur dichloride; moderately soluble in methylcyclohexane
- Vapor Pressure
- 40 mmHg at 57 °F (NIOSH, 2024)
- Vapor pressure: 100 Pa (0.75 mm Hg) at -45 °C (extrapolated); 1 kPa (7.5 mm Hg) at -15 °C (extrapolated); 10 kPa (75 mm Hg) at 27.5 °C; 100 kPa (750 mm Hg) at 90.4 °C
Calculated properties
- Molecular weight
- 250.53 g/mol
- Exact mass
- 249.76227 Da
- Polar surface area
- 0 Ų
- Complexity
- 8
- H-bond donors
- 0
- H-bond acceptors
- 0
- logP
- 2.156
- Topological polar surface area
- 0 Ų
- H-bond donors
- 0
- H-bond acceptors
- 0
- Rotatable bonds
- 0
- Molar refractivity
- 32.535 cm³/mol
- Fraction sp³ carbons
- 0
- QED drug-likeness
- 0.5781
What it is made of
Elements
Structure
- Heavy atoms, hydrogen excluded
- 4
- Total atoms, hydrogen included
- 4
- Rings
- 0
- Aromatic rings
- 0
- Stereocentres
- 0
- Formal charge
- 0
The molecule in three dimensions
The drawing above is a diagram of what is bonded to what. A molecule is not flat, and the model here is one low-energy shape generated from the connectivity — useful for seeing which groups can reach each other, and not a measured structure. A real sample is a population of conformations, interconverting.
Reactions it appears in
Other names for it
The systematic name on this record is tribromoborane.
The sources also call it Tribromoborane, Boron bromide, Borane, tribromo-, Tribromoboron, Boron bromide (BBr3), Borontribromide.
Structurally related
Seen alongside it in reaction records
Molecules that appear in the same recorded reactions as Boron tribromide. This says nothing about structure: most of them are the bases, solvents, ligands and catalysts the chemistry needed, and they are here because somebody put them in the same flask.
1,1-Dichloroethane
used as a reactant
C₂H₄Cl₂, 98.96 g/mol.
(6-Hydroxy-benzo[b]thiophen-3-yl)-acetic acid ethyl ester
formed as a product
C₁₂H₁₂O₃S, 236.292 g/mol.
(3-Fluorophenyl)(4-methoxyphenyl)methanone
used as a reactant
C₁₄H₁₁FO₂, 230.238 g/mol.
(3-Fluorophenyl)(4-hydroxyphenyl)methanone
formed as a product
C₁₃H₉FO₂, 216.211 g/mol.
1,1-Dioxo-3,3-dibutyl-5-(4-chlorophenyl)-7-methylthio-8-methoxy-2,3,4,5-tetrahydro-1,5-benzothiazepine
used as a reactant
C₂₅H₃₄ClNO₃S₂, 496.138 g/mol.
Where these values came from
chemistry engine
What this page does not claim
Identifiers are copied from the source record, measured values are reported as published, and calculated values are marked as calculated. Nothing here is a hazard, purity or handling assessment — how the library is checked.
Where to next
More molecules under B
The rest of this shelf, a hundred names at a time.
Molar mass calculator
Work with BBr3 in a calculation, with every element's contribution shown.
Molarity calculator
Grams of Boron tribromide for a volume and a concentration, or the concentration a mass gives.
Open in ReactionLens
The full record in the workstation: every atom, every bond, and the reactions it appears in.