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

For SF5CF3 (Sulfur, pentafluoro(trifluoromethyl)-)

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) cc-pVDZ cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.001966 -0.022950 -0.030694 -0.014411 -0.040308 -0.040307 -0.044876 -0.290886 -0.290885 -0.083532 -0.027981 -0.159662
MP3=FULL         -0.038227   -0.098358          
Coupled Cluster CCSD(T)=FULL         0.004673              
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) cc-pVDZ cc-pVTZ