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

For CF3COF (trifluoroacetyl fluoride)

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
Moller Plesset perturbation MP2=FULL -0.000990 -0.012613 -0.012613 -0.008005 -0.022592 -0.022591 -0.024711 -0.131805 -0.131805 -0.047227 -0.119266 -0.015407 -0.094707
MP3=FULL         -0.021517   -0.023627       -0.122417 -0.014212 -0.094924
MP4=FULL   -0.011764     -0.021738       -0.134570     -0.014255 -0.095087
B2PLYP=FULL -0.000295 -0.003689 -0.003689 -0.002343 -0.006602 -0.006602 -0.007209 -0.037181 -0.037181 -0.013595 -0.033684 -0.004482 -0.027191
Quadratic configuration interaction QCISD(T)=FULL         -0.021599             -0.014166 -0.095055
Coupled Cluster CCSD=FULL         -0.021376         -0.046601 -0.122245 -0.014003 -0.094317
CCSD(T)=FULL         -0.021608           -0.122828 -0.014169 -0.095086
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