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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 GeF+ atoms 1 and 2

For GeF+ (Germanium monofluoride cation)
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 0.0015 0.0009 -0.0005 0.0158 0.0218 0.0218 0.0228 0.0265 0.0265 0.0423 -0.0005 0.0002 0.0025 0.0081 0.0008 0.0049 0.0105
MP3=FULL         0.0203   0.0213       -0.0010 0.0001 0.0015        
MP4=FULL   0.0010     0.0225       0.0272     0.0003 0.0027   0.0010 0.0053  
B2PLYP=FULL 0.0009 0.0003 -0.0002 0.0087 0.0095 0.0095 0.0096 0.0111 0.0111 0.0163 -0.0002 0.0001 0.0008   0.0003 0.0015  
Quadratic configuration interaction QCISD(T)=FULL         0.0215             0.0002 0.0021   0.0008 0.0044  
Coupled Cluster CCSD=FULL         0.0208         0.0420 -0.0007 0.0002 0.0019 0.0067 0.0003 0.0042 0.0087
CCSD(T)=FULL         0.0214           -0.0007 0.0002 0.0020 0.0071 0.0008 0.0043 0.0090
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

gefq1.gif