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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 LiCl atoms 1 and 2

For LiCl (lithium chloride)
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ
Moller Plesset perturbation MP2=FULL -0.0228 0.0005 0.0004 0.0007 0.0032 0.0040 0.0060 0.0221 0.0061 0.0227 0.0011 0.0020 -0.0002 0.0174 0.0349 0.0292 0.0223 0.0146 0.0032 0.0114
MP3=FULL         0.0016   0.0084       0.0008 0.0018 0.0138           0.0027 0.0106
MP4=FULL   0.0001     0.0043       0.0060     0.0024 0.0138   0.0387 0.0219     0.0030 0.0106
B2PLYP=FULL -0.0001 0.0087 0.0002 0.0003 -0.0017 0.0015 -0.0026 0.0019 0.0019 0.0055 0.0004 0.0007 0.0194   0.0107 0.0065     0.0011 0.0035
Quadratic configuration interaction QCISD(T)=FULL         0.0044             0.0025 0.0138   0.0390 0.0219     0.0034 0.0107
Coupled Cluster CCSD=FULL         0.0046         0.0189 0.0007 0.0018 0.0137 0.0177 0.0393 0.0216 0.0232   0.0027 0.0103
CCSD(T)=FULL         0.0044           0.0009 0.0024 0.0138 0.0182 0.0393 0.0219 0.0237   0.0032 0.0106
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 cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ

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