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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 AsCl atoms 1 and 2

For AsCl (Arsenic monochloride)
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 0.0003 0.0001 0.0010 0.0002 0.0050 0.0050 0.0052 0.0048 0.0048 0.0179 -0.0001 0.0018 0.0067 0.0031 0.0023 0.0101 0.0073
MP3=FULL         0.0036   0.0038       -0.0009 0.0014 0.0053        
MP4=FULL   0.0001     0.0044       0.0032     0.0018 0.0066   0.0023 0.0095  
B2PLYP=FULL 0.0001 0.0001 0.0003 0.0001 0.0017 0.0017 0.0018 0.0016 0.0016 0.0058 0.0000 0.0006 0.0020   0.0007 0.0031  
Quadratic configuration interaction QCISD(T)=FULL         0.0043             0.0018 0.0061   0.0022 0.0086  
Coupled Cluster CCSD=FULL         0.0042         0.0154 -0.0001 0.0016 0.0059 0.0024 0.0022 0.0091 0.0059
CCSD(T)=FULL         0.0042             0.0016 0.0061 0.0024 0.0022 0.0094 0.0059
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

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