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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 Cl2 atoms 1 and 2

For Cl2 (Chlorine diatomic)
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) 6-311+G(3df,2pd) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(D+d)Z cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ cc-pCVQZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ Sadlej_pVTZ
Moller Plesset perturbation MP2=FULL 0.0001 -0.0007 -0.0003 -0.0008 -0.0105 0.0002 -0.0000 -0.0155 0.0007 0.0049 0.0049 0.0049 0.0006 0.0004 0.0043 0.0034 -0.0001 0.0067 0.0039 0.0009 0.0067 0.0016 0.0038 0.0048 0.0040 0.0000 0.0072 0.0005
MP3=FULL         0.0156   -0.0015           0.0005 0.0002 0.0041             0.0013 0.0029 0.0043 0.0031 -0.0000 0.0071  
MP4=FULL 0.0002 -0.0006 -0.0004 -0.0007 0.0001 0.0001 -0.0001 0.0002 0.0008 0.0054 0.0049 0.0049 0.0008 0.0004 0.0046 0.0031 -0.0001 0.0072 0.0037     0.0015 0.0030 0.0046 0.0040 -0.0000 0.0078  
B2PLYP=FULL 0.0000 -0.0002 -0.0001 -0.0002 0.0001 0.0001 -0.0000 0.0002 0.0002 0.0016     0.0002 0.0001 -0.0081   -0.0000 0.0021       0.0004 0.0010 0.0013 0.0011 0.0000 0.0022  
Quadratic configuration interaction QCISD(T)=FULL         0.0002   -0.0001             0.0004 0.0047 0.0032 -0.0001 0.0074 0.0038             0.0000 0.0080  
Coupled Cluster CCSD=FULL 0.0002 -0.0000 -0.0000 -0.0003 0.0005 0.0005 0.0003 0.0013 0.0013 0.0054 0.0052 0.0052 0.0011 0.0005 0.0048 0.0036 0.0001 0.0072 0.0041     0.0028 0.0044 0.0058 0.0046 0.0003 0.0078  
CCSD(T)=FULL 0.0002 -0.0005 -0.0004 -0.0007 0.0002 -0.0003 -0.0001 0.0003 0.0003 0.0054 0.0049 0.0050 0.0009 0.0004 0.0047 0.0032 -0.0000 0.0073 0.0038 0.0013 0.0061 0.0017 0.0033 0.0038 0.0031 0.0001 0.0079  
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) 6-311+G(3df,2pd) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(D+d)Z cc-pV(T+d)Z cc-pCVDZ cc-pCVTZ cc-pCVQZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ Sadlej_pVTZ

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