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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 GaP atoms 1 and 2

For GaP (Gallium 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 -0.0055 0.0007 0.0026 0.0047 0.0130 0.0130 0.0130 0.0207 0.0207 0.0322 -0.0001 0.0026 0.0101 0.0152 0.0036 0.0106 0.0198
MP3=FULL         0.0094   0.0095       -0.0032 0.0021 0.0083        
MP4=FULL   0.0006     0.0125       0.0221     0.0030 0.0113   0.0041 0.0118  
B2PLYP=FULL -0.0011 0.0004 0.0010 0.0023 0.0059 0.0059 0.0059 0.0091 0.0091 0.0134 -0.0000 0.0010 0.0042   0.0014 0.0043  
Quadratic configuration interaction QCISD(T)=FULL         0.0136             0.0034 0.0129   0.0046 0.0134  
Coupled Cluster CCSD=FULL         0.0129         0.0346 -0.0018 0.0030 0.0117 0.0150 0.0039 0.0122 0.0194
CCSD(T)=FULL         0.0134           -0.0018 0.0041 0.0123 0.0154 0.0044 0.0128 0.0205
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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