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

For SO2F2 (Sulfuryl 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 aug-cc-pVDZ aug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.001404 -0.013241 -0.021219 -0.008164 -0.024722 -0.024722 -0.026801 -0.195762 -0.195762 -0.053691 -0.098218 -0.017068 -0.090421 -0.022227 -0.101052
MP3=FULL         -0.023532   -0.049294                
Coupled Cluster CCSD=FULL         -0.023284         -0.052310     -0.088897   -0.099910
CCSD(T)=FULL         -0.023671           -0.099617 -0.015872 -0.090074 -0.021021  
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 aug-cc-pVDZ aug-cc-pVTZ