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Experimental data for BBr3 (Boron tribromide)

22 02 02 11 45
Other names
tribromoborane;
INChI INChIKey SMILES IUPAC name
InChI=1S/BBr3/c2-1(3)4 ILAHWRKJUDSMFH-UHFFFAOYSA-N BrB(Br)Br Boron tribromide
State Conformation
1A1' D3H
Enthalpy of formation (Hfg), Entropy, Integrated heat capacity (0 K to 298.15 K) (HH), Heat Capacity (Cp)
Property Value Uncertainty units Reference Comment
Hfg(298.15K) enthalpy of formation -204.18   kJ mol-1 webbook
Hfg(0K) enthalpy of formation     kJ mol-1 webbook
Entropy (298.15K) entropy 324.19   J K-1 mol-1 webbook
Information can also be found for this species in the NIST Chemistry Webbook
Vibrational levels (cm-1) vibrations
Mode Number Symmetry Frequency Intensity Comment Description
Fundamental(cm-1) Harmonic(cm-1) Reference (km mol-1) unc. Reference
1 A1' 279   1972Cla/Mit:2225      
2 A2" 377          
3 E' 816          
4 E' 151          

vibrational zero-point energy: 1294.8 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for BBr3 (Boron tribromide).
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment

Calculated rotational constants for BBr3 (Boron tribromide).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Boron tribromide

Point Group D3h


Internal coordinates
distances (r) in Å, angles (a) in degrees, dihedrals (d) in degrees
Description Value unc. Connectivity Reference Comment
Atom 1 Atom 2 Atom 3 Atom 4
rBBr 1.893 0.005 1 2 1976Hellwege(II/7)

Cartesians
Atom x (Å) y (Å) z (Å)
B1 0.0000 0.0000 0.0000
Br2 0.0000 1.8932 0.0000
Br3 1.6396 -0.9466 0.0000
Br4 -1.6396 -0.9466 0.0000

Atom - Atom Distances bond lengths
Distances in Å
  B1 Br2 Br3 Br4
B1   1.89321.89321.8932
Br2 1.8932   3.27913.2791
Br3 1.89323.2791   3.2792
Br4 1.89323.27913.2792  

Calculated geometries for BBr3 (Boron tribromide).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle         atom1 atom2 atom3 angle
Br2 B1 Br3 119.999 Br2 B1 Br4 119.999
Br3 B1 Br4 120.001

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
B-Br 3

Connectivity
Atom 1 Atom 2
B1 Br2
B1 Br3
B1 Br4
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1A1'
Dipole, Quadrupole and Polarizability
Electric dipole moment dipole
State Config State description Conf description Exp. min. Dipole (Debye) Reference comment Point Group Components
x y z total dipole quadrupole
1 1 1A1' D3h True           D3h 0 1
Experimental dipole measurement abbreviations: MW microwave; DT Dielectric with Temperature variation; DR Indirect (usually an upper limit); MB Molecular beam
Calculated electric dipole moments for BBr3 (Boron tribromide).
Electric quadrupole moment quadrupole
State Config State description Conf description Exp. min. Quadrupole (D Å) Reference comment Point Group Components
xx yy zz dipole quadrupole
1 1 1A1' D3h True       D3h 0 1

Calculated electric quadrupole moments for BBr3 (Boron tribromide).
Electric dipole polarizability (Å3) polarizability
alpha unc. Reference
11.351 0.148 2015Tha/Wu:144302

Calculated electric dipole polarizability for BBr3 (Boron tribromide).

References
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squib reference DOI
1972Cla/Mit:2225 RJH Clark, PD Mitchell "Raman Spectra and Factor Group Analyses of Crystalline Born Trihalides" Journal of Cehmical Physics 56(5) 2225, 1972 10.1063/1.1677524
1976Hellwege(II/7) Hellwege, KH and AM Hellwege (ed.). Landolt-Bornstein: Group II: Atomic and Molecular Physics Volume 7: Structure Data of Free Polyatomic Molecules. Springer-Verlag. Berlin. 1976.  
2015Tha/Wu:144302 AJ Thakkar, T Wu "How well do static electronic dipole polarizabilities from gas-phase experiments compare with density functional and MP2 computations?" J. Chem. Phys. 143, 144302 (2015) 10.1063/1.4932594
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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