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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 GaH atoms 1 and 2

For GaH (Gallium monohydride)
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 -0.0085 0.0010 0.0006 0.0028 0.0019 0.0097 0.0097 0.0137 0.0249 0.0181 0.0007 0.0012 0.0114 0.0234 0.0051 0.0152 0.0352
MP4=FULL   0.0011     0.0036       0.0257     0.0014 0.0128   0.0056 0.0162  
Coupled Cluster CCSD=FULL         0.0029           -0.0012 0.0008 0.0101 0.0208 0.0045 0.0124 0.0314
CCSD(T)=FULL         0.0030           -0.0016 0.0015 0.0108 0.0212 0.0049 0.0132 0.0319
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

gahq1.gif