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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 HCl+ atoms 1 and 2

For HCl+ (hydrogen chloride cation)
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) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ
Moller Plesset perturbation MP2=FULL 0.0001 -0.0002 -0.0000 0.0000 0.0003 0.0013 0.0013 0.0017 -0.0002 0.0019 0.0010 0.0002 0.0045 0.0014 0.0021 0.0015 0.0015 0.0041 0.0016 0.0022 0.0008 0.0012
MP3=FULL         -0.0003   -0.0001       0.0011 -0.0001 0.0021 0.0015 0.0021         0.0023 0.0009 0.0013
MP4=FULL   -0.0002     0.0001       -0.0002   0.0010   0.0021 0.0015 0.0021   0.0015 0.0042   0.0022 0.0010 0.0011
B2PLYP=FULL 0.0000 0.0091 -0.0000 0.0000 0.0002 0.0004 0.0006 -0.0001 -0.0001 0.0006 0.0003 -0.0000 0.0007 0.0004 0.0030   0.0004 0.0012   0.0006 0.0003 0.0004
Quadratic configuration interaction QCISD(T)=FULL         0.0001           0.0010   0.0021 0.0015 0.0021   0.0015 0.0042   0.0022 0.0010 0.0012
Coupled Cluster CCSD=FULL         0.0002         0.0021 0.0012 -0.0000 0.0023 0.0015 0.0022 0.0016 0.0015 0.0043 0.0017 0.0024 0.0012 0.0016
CCSD(T)=FULL         -0.1020           0.0010 -0.0001 0.0021 0.0015 0.0021 0.0015 0.0015 0.0042 0.0016 0.0022 0.0010 0.0012
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) 6-311+G(3df,2p) TZVP Def2TZVPP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ

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