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

For C6H3F3 (Benzene trifluoride 123)

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 -0.002786 -0.015788 -0.015788 -0.011471 -0.037594 -0.038097 -0.039930 -0.169510 -0.169936 -0.066431 -0.153603 -0.021252 -0.131596
MP4=FULL         -0.036897       -0.175640     -0.019860  
B2PLYP=FULL -0.000842 -0.004678 -0.004678 -0.003401 -0.011079 -0.011223 -0.011751 -0.048215 -0.048343 -0.019307 -0.043724 -0.006279 -0.038042
Coupled Cluster CCSD=FULL         -0.036311                
CCSD(T)=FULL         -0.036760                
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