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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For GeF+ (Germanium monofluoride cation)

Energies in Hartree
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) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL -0.000972 -0.005647 -0.011921 -0.016946 -0.034107 -0.034107 -0.036114 -0.411335 -0.411335 -0.104943 -0.156717 -0.010872 -0.071860 -0.107581 -0.013060 -0.077646 -0.112365
MP3=FULL         -0.033717   -0.035687       -0.129484 -0.009817 -0.062161        
MP4=FULL   -0.005333     -0.035221       -0.396695     -0.010578 -0.070850   -0.012777 -0.076410  
B2PLYP=FULL -0.000466 -0.001701 -0.003737 -0.005635 -0.011381 -0.011381 -0.012021 -0.124181 -0.124181 -0.034310 -0.046843 -0.003429 -0.021883   -0.004100 -0.023566  
Quadratic configuration interaction QCISD(T)=FULL         -0.035071             -0.010427 -0.067520   -0.012568 -0.072870  
Coupled Cluster CCSD=FULL         -0.034057         -0.100298 -0.138540 -0.009951 -0.064996 -0.098216 -0.011990 -0.070329 -0.102308
CCSD(T)=FULL         -0.035078           -0.140861 -0.010421 -0.067354 -0.100718 -0.012555 -0.072706 -0.104831
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ