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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)
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 0.0016 0.0011 -0.0003 0.0227 0.0405 0.0273 0.0293 0.0438 0.0332 0.0592 -0.0005 0.0006 0.0036   0.0015 0.0080  
MP3=FULL         0.0247   0.0217                    
Coupled Cluster CCSD(T)=FULL         0.0276           -0.0005 0.0007 0.0031 0.0086 0.0014 0.0068 0.0121
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