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Experimental data for BF (Boron monofluoride)

22 02 02 11 45
Other names
Fluoroborane;
INChI INChIKey SMILES IUPAC name
InChI=1S/BF/c1-2 YFSQMOVEGCCDJL-UHFFFAOYSA-N [B]F
State Conformation
1Σ C*V
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 -106.94 10.00 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -110.00 10.00 kJ mol-1 Gurvich
Entropy (298.15K) entropy 200.45   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 8.69   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 29.59   J K-1 mol-1 Gurvich
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 Σ 1379 1402 VEEL5      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
1402.159 11.82106 0.051595 1.516744 1.904848E-02 698.4417 2007Iri:389

vibrational zero-point energy: 689.3 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for BF (Boron monofluoride).
More spectroscopic constants are available at the NIST Physics Laboratory website:
http://physics.nist.gov/PhysRefData/MolSpec/Diatomic/Html/Tables/BF.html
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  1.51674   1995Zha/Guo:82

Calculated rotational constants for BF (Boron monofluoride).
Product of moments of inertia moments of inertia
11.11435amu Å2   1.845611E-39gm cm2
Geometric Data
picture of Boron monofluoride

Point Group C∞v


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
rBF 1.267 0.000 1 2 NISTdiatomic r0 B(11)

Cartesians
Atom x (Å) y (Å) z (Å)
B1 0.0000 0.0000 0.0000
F2 0.0000 0.0000 1.2669

Atom - Atom Distances bond lengths
Distances in Å
  B1 F2
B1   1.2669
F2 1.2669  

Calculated geometries for BF (Boron monofluoride).

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
B-F 1

Connectivity
Atom 1 Atom 2
B1 F2
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Σ
29144.3 6 Gurvich
51157.94 2 Gurvich

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
11.120 0.010     webbook
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 1Σ C∞v True       0.500 1971Lov/Joh:41 ± 0.2 C∞v 1 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 BF (Boron monofluoride).
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 1Σ C∞v True       C∞v 1 1

Calculated electric quadrupole moments for BF (Boron monofluoride).

References
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squib reference DOI
1971Lov/Joh:41 FJ Lovas, DR Johnson "Microwave Spectrum of BF" J. Chem. Phys. 55(1), 41, 1971 10.1063/1.1675537
1995Zha/Guo:82 K-Q Zhang, B Guo, V Braun, M Dulick, PF Bernath "Ifrared Emission Spectroscopy of BF and AlF" J. Mol. SPectr.170, 82-93 (1995) 10.1006/jmsp.1995.1058
2007Iri:389 KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007 10.1063/1.2436891
Gurvich Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989  
NISTdiatomic NIST Diatomic Spectral Database (www.physics.nist.gov/PhysRefData/MolSpec/Diatomic/index.html) 10.18434/T4T59X
VEEL5 M.E. Jacox, Vibrational and Electronic Energy Levels of Polyatomic Transient Molecules, J. Phys. Chem.Ref. Data, Monograph 3 (1994) (updated data in NIST Chemistry Webbook - http://webbook.nist.gov/chemistry/  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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