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

For GaH (Gallium monohydride)


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 aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL -0.003347 -0.002914 -0.009136 -0.012556 -0.024277 -0.024878 -0.024986 -0.410568 -0.411480 -0.076350 -0.141721 -0.007400 -0.048479 -0.078154 -0.008925 -0.050866 -0.081746
MP4=FULL   -0.002820     -0.026278       -0.399670     -0.007527 -0.049449   -0.009084 -0.051728  
Coupled Cluster CCSD=FULL         -0.025003           -0.120310 -0.006731 -0.042506 -0.066569 -0.008109 -0.044485 -0.069445
CCSD(T)=FULL         -0.026122           -0.122676 -0.007229 -0.044734 -0.069215 -0.008697 -0.046763 -0.072129
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 aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ