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Calculated Ionization Energy for SO (Sulfur monoxide)

20 09 09 14 00
Experimental Ionization Energy is 10.294 ± 0.004 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  
composite G2 10.288
G3 10.371
G3B3 10.310
G3MP2 10.322
G4 10.306
CBS-Q 10.372

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 cc-pV(T+d)Z daug-cc-pVDZ daug-cc-pVTZ
hartree fock HF 6.088 11.094 10.276 11.388 10.252 10.252 10.353 10.256 10.256 10.133 10.232 10.354 10.304 10.054 10.079 10.428 10.274 10.232 10.147 10.415 10.271
ROHF   10.892 10.077   10.431 10.431 10.140 10.432 10.432   10.019 10.537 10.084 10.001 10.438 10.623 10.493 10.453   10.178 10.048
density functional LSDA 8.069 7.159 10.725 11.442 10.836 10.836 11.006 10.887 10.887 10.759     10.848 10.900   11.039 10.956        
BLYP 7.442 10.433 10.048 10.758 10.170 10.170 10.369 10.227 10.227 10.088 10.282 10.336 10.165 10.232   10.394 10.309     10.388 10.306
B1B95 7.984 10.347 10.347 11.146 10.393 10.393 10.527 10.420 10.420 10.299   10.506 10.417 10.401 10.471   10.455 10.492   10.577 10.452
B3LYP 7.926 10.887 10.415 11.202 10.500 10.500 10.663 10.536 10.536 10.405 10.563 10.639 10.510 10.531 10.541 10.696 10.594 10.565   10.688 10.591
B3LYPultrafine   10.886     10.500 10.500 10.663 10.536   10.405 10.563 10.639 10.510 10.531   10.696 10.594     10.688 10.591
B3PW91 8.037 10.977 10.496 11.256 10.546 10.546 10.678 10.577 10.577 10.457 10.593 10.660 10.577 10.565   10.717 10.615     10.706 10.612
mPW1PW91 8.076 11.016 10.514 11.299 10.561 10.561 10.695 10.596 10.596 10.472 10.610 10.674 10.590 10.576   10.733 10.631     10.723 10.628
M06-2X 8.018 11.042 10.470 11.320 10.481 10.481 10.606 10.530 10.530 10.376 10.523 10.611 10.483 10.522   10.627 10.570     10.617 10.568
PBEPBE 7.606 10.606 10.211 10.907 10.309 10.309 10.480 10.358 10.358 10.238 10.410 10.453 10.319 10.360   10.511 10.432     10.503 10.429
PBEPBEultrafine         10.309 10.309 10.480 10.358   10.238 10.410 10.452 10.319 10.360   10.511 10.432     10.503 10.429
PBE1PBE 7.999 10.473 10.473 11.264 10.526 10.526 10.660 10.555 10.555 10.440 10.574 10.643 10.554 10.544   10.700 10.600     10.689 10.597
HSEh1PBE 7.994 10.961 10.463 11.253 10.519 10.519 10.655 10.548 10.548 10.430 10.567 10.640 10.545 10.538   10.693 10.594     10.683 10.591
TPSSh 7.870 10.851 10.399 11.129 10.457 10.457 10.591 10.503 10.503 10.370 10.519 10.578 10.475 10.482 10.484 10.614 10.537 10.508   10.603 10.535
wB97X-D 8.020 10.977 10.454 11.247 10.485 10.485 10.612 10.515 10.515 10.384 10.511 10.583 11.048 10.479 10.484 10.657 10.524 10.504   10.644 10.520
B97D3   10.728 10.321 10.993 10.371 10.371 10.519 10.425 10.425 10.294 10.443 10.495 10.382 10.404 10.413 10.543 10.463 10.438   10.534 10.461
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 cc-pV(T+d)Z daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2 5.112 11.023 9.388 9.847 9.623 9.623 9.779 9.604 9.604 9.855 10.036 9.762 9.679 10.681 10.069 9.987 10.079 10.113 9.764 9.980 10.077
MP2=FULL 5.103 11.023 9.382 9.842 9.615 9.615 9.771 9.602 9.602 9.848 10.037 9.754 9.674 10.652 10.069 9.980 10.068 10.112 9.654 9.972 10.066
ROMP2   9.658 9.658   9.919 9.919 10.071 9.893 9.893 10.117 10.269 10.073 9.999 10.226   10.307       10.297 10.339
MP3         9.988   9.988         10.137 10.075 10.324              
MP3=FULL         9.979   10.113         10.129 10.068 10.310              
MP4         9.592       9.566     9.721 9.650 9.988   9.997 10.119        
MP4=FULL         9.584       9.563       9.646 9.981   9.992 10.108        
B2PLYP 7.041 10.250 10.083 10.560 10.170 10.170 10.331 10.175 10.175 10.164 10.327 10.327 10.222 10.285   10.458 10.370     10.449 10.368
B2PLYP=FULL   10.248 10.081 10.559 10.167 10.167 10.328 10.174 10.174 10.160 10.326 10.324 10.220 10.281   10.454 10.364     10.445 10.361
B2PLYP=FULLultrafine   10.248 10.080 10.559 10.167 10.167 10.328 10.174 10.174 10.160 10.326 10.324 10.219 10.281   10.454       10.445 10.361
Configuration interaction CID   10.124 9.806 10.506 9.960     9.951     10.281   10.034 10.255           10.290 10.344
CISD   10.152 9.768 10.515 9.943     9.936     10.276   10.017 10.246           10.286 10.339
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 cc-pV(T+d)Z daug-cc-pVDZ daug-cc-pVTZ
Quadratic configuration interaction QCISD   10.016 9.609 10.353 9.827 9.827 9.991 9.827 9.827 10.085 10.260 9.994 9.902 10.220   10.240 10.327     10.230 10.326
QCISD(T)         9.752     9.737     10.204 9.904 9.819 10.154   10.177 10.271     10.169 10.270
QCISD(T)=FULL         9.744   9.912       10.201   9.814 10.128 10.254 10.169 10.256 10.299   10.160 10.253
Coupled Cluster CCD   9.944 9.706 10.329 9.883 9.883 10.026 9.873 9.873 10.119 10.276 10.032 9.959 10.638   10.260 10.344     10.251 10.343
CCSD         9.869 9.869 10.027 9.862 9.862 10.115 10.283 10.029 9.942 10.238 10.335 10.271 10.352 10.375   10.262 10.351
CCSD=FULL         9.863         10.105 10.286 10.025 9.938 10.230 10.336 10.264 10.338 10.374   10.254 10.335
CCSD(T)         9.764 9.764 9.929 9.749 9.749 10.038 10.213 9.915 9.831 10.150 10.266 10.185 10.280 10.313 9.937 10.177 10.280
CCSD(T)=FULL         9.756           10.210 9.909 9.826 10.139 10.263 10.177 10.265 10.308   10.168 10.262
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 cc-pV(T+d)Z daug-cc-pVDZ 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 11.564 10.427 11.424 10.350 11.554 11.358     10.201
ROHF                 9.986
density functional BLYP                 10.234
B1B95                 10.391
B3LYP 11.389 10.672 11.265 10.592 11.347 11.203     10.524
B3LYPultrafine                 10.524
B3PW91                 10.554
mPW1PW91                 10.566
M06-2X                 10.482
PBEPBE                 10.362
PBEPBEultrafine                 10.362
PBE1PBE                 10.535
HSEh1PBE                 10.530
TPSSh                 10.474
wB97X-D 11.348 10.578 11.224 10.498 11.355 11.263     10.468
B97D3                 10.395
Moller Plesset perturbation MP2 9.360 9.829 9.909 9.774 9.363 11.531     9.991
MP2=FULL                 9.991
ROMP2                 10.228
B2PLYP                 10.285
B2PLYP=FULL                 10.284
B2PLYP=FULLultrafine                 10.284
Configuration interaction CID                 10.250
CISD                 10.242
Quadratic configuration interaction QCISD                 10.216
QCISD(T)                 10.151
QCISD(T)=FULL                 10.147
Coupled Cluster CCD                 10.241
CCSD                 10.242
CCSD=FULL                 10.243
CCSD(T)                 10.162
CCSD(T)=FULL                 10.158
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.