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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 ZnF atoms 1 and 2

For ZnF (Zinc monofluoride)
Bond length differences (full - frozen) in Å. Mouse over a difference for the bond length with full correlation.
Methods with standard basis sets
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 -0.0018 -0.0018 -0.0064 0.1031 -0.0002 0.0056 0.0642 -0.0039 0.0128 -0.0045 0.0009 0.0005 0.0003 0.0142 0.0049 0.0039
MP3=FULL       -0.0988   0.0000       -0.0061 -0.0010 -0.0017        
MP4=FULL -0.0011     0.0017       -0.0020     0.0044 0.0048   0.0171 0.0094  
B2PLYP=FULL 0.0034 -0.0005 -0.0021 -0.0065 -0.0000 0.0015 -0.0014 -0.0017 0.0041 -0.0015 0.0001 0.0627   0.0043 0.0013  
Quadratic configuration interaction QCISD(T)=FULL       -0.0002             -0.0002 -0.0005   0.0107 0.0035  
Coupled Cluster CCSD=FULL       0.0001         0.0110 -0.0053 0.0002 -0.0004 -0.0008 0.0112 0.0037 0.0027
CCSD(T)=FULL       0.0001           -0.0057 0.0003 -0.0002 -0.0005 0.0112 0.0039 0.0031
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

znfq1.gif