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Calculated Ionization Energy for LiBr (Lithium Bromide)

Experimental Ionization Energy is 9.3 eV
Please note! These calculated ionizataion energies have the vibrational zero-point energy (zpe) included, but the zpe has NOT been scaled. Click on an entry for more details, including the ionization energy with a scaled zpe.
Original data displayed. Press to display differences.
Differences displayed. Press to display original data.

Ionization Energies in eV
Methods with predefined basis sets
semi-empirical PM3  
PM6  
composite G3B3 9.207
G4 9.206
CBS-Q 9.221

Ionization Energies in eV
Methods with standard basis sets
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
hartree fock HF 6.486 7.830 7.901 8.146 8.078 8.078 8.127 8.135 8.135 8.038   8.057 8.063     8.101 8.063
density functional LSDA 8.706 2.767 9.807 9.962 9.950 9.950 10.016 10.068 10.068 9.957       9.930 10.040 10.026  
BLYP 7.819 8.768 8.895 9.044 9.019 9.019 9.107     9.011              
B1B95 7.863   8.929 9.099 8.995 9.083               9.059 9.072    
B3LYP 7.923 8.932 9.063 9.219 9.201 9.201 9.274 9.303 9.303 9.192   9.236 9.266 9.182 9.268 9.266 9.276
B3LYPultrafine         9.201                       9.276
B3PW91 7.888 8.930 9.053 9.219 9.197 9.197 9.247 9.275 9.275 9.178              
mPW1PW91 7.855 8.924 9.041 9.202 9.178 9.178 9.230 9.253 9.253 9.156              
M06-2X     8.973   9.182                        
PBEPBE 7.958 8.909 9.023 9.181 9.152 9.152 9.221 9.250 9.250 9.134     9.208        
PBE1PBE         9.162                        
HSEh1PBE   8.909     9.159   9.214               9.200    
TPSSh         9.167   9.217     9.144         9.200    
wB97X-D     8.936   9.072   9.125   9.124     9.057   9.125 9.088   9.090
B97D3   8.757     9.030   9.100   9.124   9.094       9.086   9.093
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
Moller Plesset perturbation MP2 6.829 8.186 8.653 8.500 8.869 8.869 8.931 8.885 8.885 8.996   8.842 9.094 8.827 9.120 8.997 9.173
MP2=FULL 6.829 8.186 8.658 8.499 8.903 8.903 8.966 8.934 8.934 9.081         9.157    
MP3         8.810                        
MP3=FULL         8.827   8.890                    
MP4   8.224     8.794       8.821                
B2PLYP         9.039                        
Configuration interaction CID   8.177     8.714                        
CISD   8.195     8.708                        
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ
Quadratic configuration interaction QCISD   8.218   8.533 8.767 8.767 8.829 8.783 8.783 8.884       8.709 8.971    
QCISD(T)         8.784                        
Coupled Cluster CCD   8.193   8.514 8.771 8.771 8.833 8.784 8.784 8.892       8.711      
CCSD(T)                           8.728 9.032 8.914 9.086
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ aug-cc-pVDZ aug-cc-pVTZ

Ionization Energies in eV
Methods with effective core potentials (select basis sets)
daug-cc-pVDZ daug-cc-pVTZ daug-cc-pVQZ Sadlej_pVTZ CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD
hartree fock HF         7.978   8.048   7.983 8.036
density functional B3LYP         9.019   9.077   9.066 9.157
Moller Plesset perturbation MP2         8.341   8.417   8.333 8.405
For descriptions of the methods (AM1, HF, MP2, ...) and basis sets (3-21G, 3-21G*, 6-31G, ...) see the glossary in section I.C. Predefined means the basis set used is determined by the method.