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

For SF5 (Sulfur pentafluoride)

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 -0.001260 -0.015299 -0.023028 -0.009436 -0.026331 -0.026331 -0.029046 -0.214798 -0.214798 -0.054172 -0.115561 -0.018518 -0.103382 -0.024011 -0.116197
MP3=FULL         -0.024916   -0.068459                
MP4=FULL   -0.014005     -0.025107       -0.215540     -0.017135 -0.102699    
Coupled Cluster CCSD=FULL         -0.024703           -0.116168 -0.016843 -0.101402    
CCSD(T)=FULL         -0.025080           -0.117028 -0.017130 -0.102681 -0.022549 -0.115871
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