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Calculated Ionization Energy for SeO2 (Selenium dioxide)

20 09 09 14 00
Experimental Ionization Energy is 11.5 ± 0.5 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
composite G2 11.865
G3 11.856
G3B3 11.700
G4 11.733
CBS-Q 11.843

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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVTZ
hartree fock HF 6.699 10.302 10.738 10.986 11.120 11.120 11.326 11.235 11.235 11.147   11.282 11.085 11.193 11.241 11.252 11.258 11.257 11.252
density functional LSDA 7.891   11.561 11.965 11.926 11.926 12.230 12.147 12.147 11.970     11.881 12.143   12.210      
BLYP 7.076 10.271 10.568 10.961 10.972 10.972 11.346 11.187 11.187 11.020   11.308 10.917 11.208   11.317 11.337    
B1B95 7.467     11.861     11.977     11.726       11.535          
B3LYP 7.564 10.810   11.499     11.720     11.460                  
B3LYPultrafine   10.811         11.725                        
B3PW91 7.651 10.941   11.583     11.734     11.505   11.691   11.617     11.696    
mPW1PW91 7.666 10.940 11.365 11.593           11.503                  
M06-2X 7.883 11.185 11.533 11.910     11.992     11.784       11.919     11.988    
PBEPBE 7.260 10.494 10.791 11.151 11.135 11.135 11.452 11.325 11.325 11.164   11.418 11.096 11.321   11.427 11.434    
PBEPBEultrafine   10.495     11.136 11.136 11.453 11.326       11.420 11.097 11.322   11.428 11.435    
PBE1PBE 7.595   11.592 11.557     11.696     11.474                  
HSEh1PBE 7.582 10.879 11.390 11.537           11.457                  
TPSSh 7.457     11.454 11.279 11.279 11.543 11.450 11.450 11.299   11.518 11.236 11.427 11.481 11.490 11.516 11.513  
wB97X-D 7.705 10.993 11.360 11.664           11.582                  
B97D3                     11.455                
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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVTZ
Moller Plesset perturbation MP2 6.927 10.733 10.984 11.573 11.551 11.551 11.848 11.617 11.617 11.776   11.769 11.433 11.944 12.172 12.014 12.170 12.262  
MP2=FULL 6.926 10.731 10.982 11.567 11.551 11.551 11.845 11.628 11.628 11.779   11.765 11.432 11.942 12.210 12.009 12.162 12.608  
MP3         11.556   10.775         11.731 11.452 11.922          
MP3=FULL   10.588 10.976 11.426 11.558 11.558 11.804 11.632 11.632 11.820   11.730 11.453 11.921   11.896 12.089    
MP4         11.198       11.281     11.414 11.073 11.624   11.682      
MP4=FULL         11.194       11.282       11.070 11.620   11.676 11.855    
B2PLYP 7.009 10.509 10.847 11.235 11.303 11.303 11.621 11.451 11.451 11.434   11.562 11.233 11.566   11.634 11.710    
B2PLYP=FULL 7.008 10.509 10.847 11.233 11.304 11.304 11.622 11.453 11.453 11.438   11.562 11.234 11.568   11.635 11.712    
B2PLYP=FULLultrafine 7.009 10.511 10.849 11.234   11.304 11.622 11.454 11.454 11.439   11.562       11.635      
Configuration interaction CID   10.594 10.962 11.414 11.488     11.580                      
CISD   10.383 10.806 11.174 11.368     11.471                      
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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVTZ
Quadratic configuration interaction QCISD         11.101 11.101 11.397     11.451     10.990     11.464 11.709    
QCISD(T)         11.040     11.120       11.229   11.453   11.408 11.653    
QCISD(T)=FULL         11.044   11.346           10.905 11.463 11.677 11.413 11.668 11.746  
Coupled Cluster CCD   10.603 10.973 11.465 11.551 11.551 11.819 11.634 11.634 11.830   11.750 11.448 11.960   11.923 12.146    
CCSD         11.240         11.564   11.451 11.136 11.662   11.599 11.834    
CCSD=FULL         11.245         11.683   11.453   11.686   11.601 11.863    
CCSD(T)         11.122 11.122   11.216       11.331 11.006   11.751 11.505 11.737 11.822  
CCSD(T)=FULL         11.125             11.332 11.008 11.549 11.762 11.507      
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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ daug-cc-pVTZ

Ionization Energies in eV
Methods with effective core potentials (select basis sets)
CEP-31G CEP-31G* CEP-121G CEP-121G* LANL2DZ SDD cc-pVTZ-PP aug-cc-pVTZ-PP Def2TZVPP
hartree fock HF 11.107   11.094   11.010 11.048     11.216
density functional B3LYP 11.754   11.764   11.654 11.692      
PBEPBE                 11.362
wB97X-D 11.837   11.850   11.780 11.802      
Moller Plesset perturbation MP2 11.944   11.985   11.813 11.847     12.011
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.