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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 NeH atoms 1 and 2

For NeH (neon hydrogen)
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) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL 0.7227 0.7227 0.1962 -1.5840 0.2459 0.0161 -1.6756 0.0040 0.0055 0.0056 0.0075 0.0193 0.0000 0.0289 0.0936 0.0026
MP3=FULL       1.8103   0.0000       0.0074 0.0006 0.0218        
MP4=FULL 0.0004     0.0031       0.0035     0.0022 0.0178   0.0164 0.0810  
B2PLYP=FULL 0.0001 0.0001 0.0001 0.0004 0.0006 0.0030 0.0014 0.0019 0.0007 0.0020 0.0003 -1.3599   0.0094 0.0533  
Quadratic configuration interaction QCISD(T)=FULL       0.0024   0.0165         0.0015 0.0176   0.0180 0.0662  
Coupled Cluster CCSD=FULL                   0.0067 0.0021 0.0197 0.0000 0.0720 0.0854 0.0000
CCSD(T)=FULL       0.0024             0.0015 0.0176 0.0080 0.0185 0.0716 0.0194
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

nehq1.gif