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Experimental data for BeF2 (Beryllium fluoride)

22 02 02 11 45
INChI INChIKey SMILES IUPAC name
InChI=1S/Be.2FH/h;2*1H/q+2;;/p-2 JZKFIPKXQBZXMW-UHFFFAOYSA-L F[Be]F
State Conformation
1Σg D*H
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 -796.59 3.90 kJ mol-1 Gurvich
Hfg(0K) enthalpy of formation -796.69 3.90 kJ mol-1 Gurvich
Entropy (298.15K) entropy 227.28   J K-1 mol-1 Gurvich
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 10.88   kJ mol-1 Gurvich
Heat Capacity (298.15K) heat capacity 45.88   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 Σg 769   webbook      
2 Σu 1555   webbook      
3 Πu 343   webbook      

vibrational zero-point energy: 1504.7 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for BeF2 (Beryllium fluoride).
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 BeF2 (Beryllium fluoride).
Product of moments of inertia moments of inertia
amu3Å6   0gm3 cm6
Geometric Data
picture of Beryllium fluoride

Point Group D∞h


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
rBeF 1.400 0.030 1 2 Gurvich

Cartesians
Atom x (Å) y (Å) z (Å)
Be1 0.0000 0.0000 0.0000
F2 0.0000 0.0000 1.4000
F3 0.0000 0.0000 -1.4000

Atom - Atom Distances bond lengths
Distances in Å
  Be1 F2 F3
Be1   1.40001.4000
F2 1.4000   2.8000
F3 1.40002.8000  

Calculated geometries for BeF2 (Beryllium fluoride).

Experimental Bond Angles (degrees) from cartesians bond angles

atom1 atom2 atom3 angle
F2 Be1 F3 180.000

Bond descriptions


Examples: C-C single bond, C=C, double bond, C#C triple bond, C:C aromatic bond
Bond Type Count
Be-F 2

Connectivity
Atom 1 Atom 2
Be1 F2
Be1 F3
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1   1Σg

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
14.500 1.000     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 1Σg D∞h True           D∞h 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 BeF2 (Beryllium fluoride).
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 1Σg D∞h True       D∞h 0 1

Calculated electric quadrupole moments for BeF2 (Beryllium fluoride).

References
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squib reference DOI
Gurvich Gurvich, L.V.; Veyts, I. V.; Alcock, C. B., Thermodynamic Properties of Individual Substances, Fouth Edition, Hemisphere Pub. Co., New York, 1989  
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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