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Experimental data for LiH (Lithium Hydride)

22 02 02 11 45
Other names
Hydrure de lithium; Lithium hydride; Lithium hydride (LiH);
INChI INChIKey SMILES IUPAC name
InChI=1S/Li.H SIAPCJWMELPYOE-UHFFFAOYSA-N [LiH] Lithium hydride
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 140.62 0.04 kJ mol-1 JANAF
Hfg(0K) enthalpy of formation 140.80 0.04 kJ mol-1 JANAF
Entropy (298.15K) entropy 170.91   J K-1 mol-1 JANAF
Integrated Heat Capacity (0 to 298.15K) integrated heat capacity 8.69   kJ mol-1 JANAF
Heat Capacity (298.15K) heat capacity 29.73   J K-1 mol-1 JANAF
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 1360 1405 2007Iri:389      

Detailed diatomic data
ωe ωexe ωeye Be αe ZPE reference
1405.498 23.1679 0.170928 7.513731 0.2163911 697.9523 2007Iri:389

vibrational zero-point energy: 679.9 cm-1 (from fundamental vibrations)
Calculated vibrational frequencies for LiH (Lithium Hydride).
More spectroscopic constants are available at the NIST Physics Laboratory website:
http://physics.nist.gov/PhysRefData/MolSpec/Diatomic/Html/Tables/LiH.html
Rotational Constants (cm-1) rotational constants
See section I.F.4 to change rotational constant units
A B C reference comment
  7.51373   2007Iri:389

Calculated rotational constants for LiH (Lithium Hydride).
Product of moments of inertia moments of inertia
2.243577amu Å2   3.725604E-40gm cm2
Geometric Data
picture of Lithium Hydride

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
rLiH 1.595 0.000 1 2 NISTdiatomic re 7Li 1H

Cartesians
Atom x (Å) y (Å) z (Å)
Li1 0.0000 0.0000 0.0000
H2 0.0000 0.0000 1.5949

Atom - Atom Distances bond lengths
Distances in Å
  Li1 H2
Li1   1.5949
H2 1.5949  

Calculated geometries for LiH (Lithium Hydride).

Bond descriptions


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

Connectivity
Atom 1 Atom 2
Li1 H2
Electronic energy levels (cm-1)
Energy (cm-1) Degeneracy reference description
0 1 1979HUB/HER 1Σ
26516 1 1979HUB/HER
34912 2 1979HUB/HER

Ionization Energies (eV)
Ionization Energy I.E. unc. vertical I.E. v.I.E. unc. reference
7.900 0.300     webbook

Electron Affinity (eV)
Electron Affinity unc. reference
0.342 0.012 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       5.880 NSRDS-NBS10 MB 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 LiH (Lithium Hydride).
Vibration specific dipole moments
Vibrational Quantum numbers Dip x Dip y Dip z Dip total Squib Comment
equil       5.828 1969Rot:1899-1900  
0       5.882 1969Rot:1899-1900 7LiH
1       5.990 1969Rot:1899-1900  

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 LiH (Lithium Hydride).

References
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squib reference DOI
1969Rot:1899-1900 E Rothstein "Molecular Constants of Lithium Hydrides by the Molecular-Beam. Electric Resonance Method" J. Chem. Phys. 50, 1899 (1969) 10.1063/1.1671294
1979HUB/HER Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Co., 1979 10.1007/978-1-4757-0961-2
2007Iri:389 KK Irikura "Experimental Vibrational Zero-Point Energies: Diatomic Molecules" J. Phys. Chem. Ref. Data 36(2), 389, 2007 10.1063/1.2436891
JANAF Chase, M.W., Jr.; Davies, C.A.; Downey, J.R., Jr.; Frurip, D.J.; McDonald, R.A.; Syverud, A.N., JANAF Thermochemical Tables (Third Edition), J. Phys. Chem. Ref. Data,Suppl. 1, 1985, 14, 1.  
NISTdiatomic NIST Diatomic Spectral Database (www.physics.nist.gov/PhysRefData/MolSpec/Diatomic/index.html) 10.18434/T4T59X
NSRDS-NBS10 R. D. Nelson Jr., D. R. Lide, A. A. Maryott "Selected Values of electric dipole moments for molecules in the gas phase" NSRDS-NBS10, 1967 10.6028/NBS.NSRDS.10
webbook NIST Chemistry Webbook (http://webbook.nist.gov/chemistry) 10.18434/T4D303

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