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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 AlF atoms 1 and 2

For AlF (Aluminum 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 6-31G* 6-31G** 6-31+G** 6-311G* 6-31G(2df,p) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ
Moller Plesset perturbation MP2=FULL -0.0010 -0.0006 -0.0009 0.0003 -0.0092 0.0019 -0.0008 0.0011 0.0137 0.0001 0.0041 0.0029 -0.0007 0.0029
MP3=FULL   0.0032   -0.0152                    
Coupled Cluster CCSD=FULL   -0.0006       0.0019   0.0010     0.0041      
CCSD(T)=FULL   -0.0007           0.0015         -0.0004 0.0029
3-21G 6-31G* 6-31G** 6-31+G** 6-311G* 6-31G(2df,p) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ

alfq1.gif