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Bond Length differences between FULL (all electrons correlated) and FROZEN core

Such as MP2=Frozen and MP2=Full
17 10 27 16 27

For GaF atoms 1 and 2

For GaF (Gallium monofluoride)
Bond length differences (full - frozen) in Å. Mouse over a difference for the bond length with full correlation.
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 0.0011 0.0015 -0.0018 0.0104 0.0190 0.0198 0.0232 0.0130 0.0155 0.0210 -0.0005 -0.0001 0.0056 0.0104 0.0023 0.0027 0.0144
MP4=FULL   0.0016     0.0201       0.0163     0.0000 0.0054   0.0024 0.0043  
Coupled Cluster CCSD=FULL         0.0185         0.0196 -0.0009 -0.0001 0.0033 0.0078 0.0019 0.0021 0.0114
CCSD(T)=FULL         0.0193           -0.0013 -0.0001 0.0041 0.0089 0.0021 0.0031 0.0125
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

gafq1.gif