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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 AsSe atoms 1 and 2

For AsSe (Arsenic monoselenide)
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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL 0.0003 0.0546 -0.0536 0.0264 0.0066 -0.0607 -0.0663 -0.0516 0.0071 0.0182 0.0128 -0.0722 -0.0603 -0.0955 0.0013 0.0016 0.0099 -0.1120
MP3=FULL         0.0057   0.0055       0.0079 -0.0028 0.0014 0.0035        
MP4=FULL   -0.0001     0.0125       0.0118   0.0203   0.0042 0.0088   0.0042 0.0145  
B2PLYP=FULL 0.0002 0.0001 0.0003 0.0004 0.0015 0.0015 0.0015 0.0014 0.0014 0.0056 0.0027 -0.0003 0.0004 0.0011   0.0004 0.0021  
Quadratic configuration interaction QCISD(T)=FULL         0.0076           0.0106   0.0024 0.0055   0.0019 0.0098  
Coupled Cluster CCSD=FULL         0.0067         0.0189 0.0107 -0.0019 0.0020 0.0050 0.0013 0.0017 0.0096 0.0034
CCSD(T)=FULL         0.0072           0.0103 -0.0021 0.0022 0.0049   0.0019 0.0100  
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 cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ

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