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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 BeN- atoms 1 and 2

For BeN- (Beryllium mononitride anion)
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) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.0001 -0.0001 -0.0001 -0.0001 -0.0248 0.0006 0.0004 -0.0607 0.0002 0.0022 0.0002 0.0009 0.0007 0.0011
MP3=FULL         0.1046   0.0022              
Coupled Cluster CCSD(T)=FULL                         0.0058  
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVTZ

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