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

For CaH (Calcium monohydride)

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 cc-pVQZ
Moller Plesset perturbation MP2=FULL -0.003967 -0.001147 -0.003843 -0.000067 -0.000114 -0.000114 -0.000126 -0.107846 -0.107919 -0.000901 -0.030120 -0.084112 -0.165963 -0.220340
MP3=FULL         -0.000096   -0.000671              
MP4=FULL   -0.001243     -0.000104       -0.105100     -0.092516 -0.180472  
Coupled Cluster CCSD=FULL         -0.000100           -0.032806 -0.091689 -0.178201 -0.236045
CCSD(T)=FULL         -0.000104           -0.033191 -0.092824 -0.180892 -0.241743
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 cc-pVQZ