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Calculated Ionization Energy for CCl3 (Trichloromethyl radical)

Experimental Ionization Energy is 8.109 ± 0.005 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 AM1  
PM3  
PM6  
composite G2 7.990
G4 8.133
CBS-Q 8.114

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 8.273 9.275 8.504 9.101 8.267 8.267 8.283 8.273 8.273 8.056   8.302 8.028 8.212 8.060 8.215 8.072
ROHF   9.183 8.386   8.139 8.139 8.156 8.145           8.086 7.917    
density functional LSDA 7.698 8.821 8.378 8.683 8.276   8.360 8.404 8.404 8.203       8.253 8.286    
BLYP 7.310 8.386 7.842 8.236 7.762 7.762 7.879 7.918 7.918 7.680       7.734 7.767    
B1B95 7.778   8.117 8.500 7.962 7.962 8.018 8.030 8.030 7.848       7.939 7.883 7.996  
B3LYP 7.834 8.819 8.261 8.674 8.147 8.147 8.229 8.258 8.258 8.038   8.233 8.069 8.114 8.100 8.213 8.127
B3LYPultrafine         8.147                       8.127
B3PW91 7.915 8.862 8.325 8.688 8.178 8.178 8.222 8.234 8.234 8.067       8.164 8.100    
mPW1PW91 7.980 8.857 8.366 8.740 8.163 8.163 8.211 8.216 8.265 8.097       8.145 8.076    
M06-2X     8.371   8.227                        
PBEPBE 7.400 8.463     7.857 7.857 7.942 7.967 7.966 7.777     7.810   7.835    
PBE1PBE         8.172                        
HSEh1PBE   8.845     8.162   8.213               8.083    
TPSSh         8.105   8.153     8.002         8.038    
wB97X-D     8.415   8.241   8.280   8.286     8.287   8.280 8.126   8.132
B97D3   8.570     7.878   7.955   7.982   7.846       7.847   7.875
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 6.921 8.361 7.839 8.210 7.659 7.659 7.733 7.712 7.712     7.772 7.805 7.718   7.939  
MP2=FULL   8.357     7.646 7.646 7.719 7.699 7.699         7.706      
ROMP2         8.142 8.142 8.157 8.145           8.095 7.919    
MP3         7.894                        
MP3=FULL         7.884   7.950                    
MP4         7.612                        
B2PLYP         7.941                   7.965    
Configuration interaction CID         7.993                        
CISD         7.973                        
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   8.513     7.835                        
Coupled Cluster CCD         7.910                        
CCSD         7.869                        
CCSD(T)         7.729                        
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         9.127 8.293 9.129 8.306 9.355 9.209
density functional B3LYP         8.801 8.267 8.782 8.260 8.844 8.731
Moller Plesset perturbation MP2         8.255 7.813 8.254 7.839 8.329 8.222
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.