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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 AsP atoms 1 and 2

For AsP (Arsenic monophosphide)
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 0.0006 -0.0009 0.0019 0.0009 0.0184 0.0057 0.0057 0.0186 0.0064 0.0194 -0.0022 0.0021 0.0063 0.0047 0.0021 0.0107 0.0070
MP4=FULL   -0.0006     0.0047       0.0026     0.0022 0.0062   0.0022 0.0105  
Coupled Cluster CCSD=FULL         0.0046           -0.0015 0.0019 0.0053 0.0041 0.0019 0.0086 0.0057
CCSD(T)=FULL         0.0047           -0.0019 0.0020 0.0051 0.0043 0.0020 0.0090 0.0055
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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