return to home page Computational Chemistry Comparison and Benchmark DataBase Release 20 (August 2019) Standard Reference Database 101 National Institute of Standards and Technology
You are here: Comparisons > Geometry > Bonds, angles > Core correlation - bond length

Bond Length differences between FULL (all electrons correlated) and FROZEN core

Such as MP2=Frozen and MP2=Full
17 10 27 16 27

For CO atoms 1 and 2

For CO (Carbon monoxide)
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-pCVDZ cc-pCVTZ cc-pCVQZ daug-cc-pVDZ daug-cc-pVTZ Sadlej_pVTZ
Moller Plesset perturbation MP2=FULL 0.0002 0.0002 0.0002 0.0002 0.0068 0.0006 0.0006 0.0042 0.0006 0.0022 0.0021 0.0021 0.0005 0.0004 0.0020 0.0014 0.0005 0.0015 0.0025 0.0006 0.0018 0.0024 0.0008 0.0048 0.0006
MP3=FULL   0.0001 0.0001 0.0001 0.0006 0.0008 0.0005 0.0006 0.0006 0.0025 0.0019   0.0007 0.0004 0.0029   0.0007 0.0043   0.0005 0.0016 0.0021 0.0007 0.0042  
MP4=FULL 0.0001 0.0001 0.0001 0.0001 0.0009 0.0010 0.0010 0.0008 0.0008 0.0029 0.0022 0.0022 0.0009 0.0005 0.0036 0.0027 0.0008 0.0054 0.0027 0.0006 0.0018 0.0023 0.0008 0.0054  
B2PLYP=FULL 0.0001 0.0144 0.0000 0.0000 0.0074 0.0003 0.0080 0.0003 0.0003 0.0016 0.0006   0.0003 0.0002 0.0024   0.0002 0.0029   0.0002 0.0005 0.0007 0.0002 0.0013  
Quadratic configuration interaction QCISD(T)=FULL         0.0009   0.0010       0.0021     0.0005 0.0033 0.0025 0.0008 0.0048 0.0025 0.0006 0.0017   0.0008 0.0049  
Coupled Cluster CCSD=FULL 0.0001 0.0001 0.0001 0.0001 0.0008 0.0010 0.0010 0.0007 0.0007 0.0023 0.0020 0.0020 0.0008 0.0005 0.0028 0.0024 0.0007 0.0041 0.0025 0.0006 0.0018 0.0023 0.0007 0.0046  
CCSD(T)=FULL -0.0001 -0.0001 0.0001 0.0001 0.0011 0.0009 0.0009 0.0008 0.0008 0.0027 0.0021 0.0020 0.0009 0.0006 0.0040 0.0030 0.0009 0.0061 0.0031 0.0006 0.0017 0.0022 0.0008    
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-pCVDZ cc-pCVTZ cc-pCVQZ daug-cc-pVDZ daug-cc-pVTZ Sadlej_pVTZ

coq1.gif