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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 HI+ atoms 1 and 2

For HI+ (Hydrogen iodide cation)
Bond length differences (full - frozen) in Å. Mouse over a difference for the bond length with full correlation.
Methods with standard basis sets
Moller Plesset perturbation MP2=FULL -0.0016
MP3=FULL -0.0015
MP4=FULL -0.0015
B2PLYP=FULL -0.0005
Quadratic configuration interaction QCISD(T)=FULL -0.0013
Coupled Cluster CCSD=FULL -0.0011
CCSD(T)=FULL -0.0020