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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 Ne2 atoms 1 and 2

For Ne2 (Neon diatomic)
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) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL 0.0000 0.0000 0.0000 0.3964 0.0031 0.0261 0.1756 0.0015 0.0040 0.0004 0.0059 0.0079 0.0150 0.6405 0.0174
MP3=FULL       -0.3830   -0.0171                  
Coupled Cluster CCSD(T)=FULL       0.0030           0.0007 0.0073 0.0075 0.0117 0.0434 0.0172
3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ

ne2q1.gif