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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 SiF- atoms 1 and 2

For SiF- (silicon monofluoride anion)
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 -0.0001 0.0003 0.0008 0.0004 -0.0442 0.0019 0.0032 -0.0533 0.0004 0.0085 0.0005 0.0018 0.0033 0.0070 0.0029 0.0080 0.0117
MP3=FULL         0.0447   -0.0001                    
MP4=FULL   0.0004     0.0020       0.0004     0.0019 0.0033   0.0032 0.0087  
Coupled Cluster CCSD=FULL         0.0019           0.0006 0.0019 0.0032 0.0067 0.0027 0.0078 0.0109
CCSD(T)=FULL         0.0020           0.0007 0.0020 0.0033 0.0073 0.0029 0.0082 0.0112
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

sifq1.gif