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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 AlP atoms 1 and 2

For AlP (Aluminum monophosphide)
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) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ
Moller Plesset perturbation MP2=FULL 0.0001 -0.0001 0.0030 0.0000 0.0106 0.0032 0.0031 0.0097 0.0012 0.0110 0.0004 0.0020 0.0077 0.0283 0.0028 0.0126 0.0322
MP3=FULL         0.0025   0.0025       -0.0009 0.0017 0.0072        
MP4=FULL   -0.0004     0.0031       0.0008     0.0021 0.0078   0.0032 0.0132  
B2PLYP=FULL 0.0000 -0.0000 0.0012 0.0000 0.0013 0.0013 0.0012 0.0005 0.0005 0.0041 0.0002 0.0008 0.0028   0.0011 0.0045  
Quadratic configuration interaction QCISD(T)=FULL         0.0044             0.0032 0.0098   0.0040 0.0168  
Coupled Cluster CCSD=FULL         0.0040           0.0003 0.0026 0.0093 0.0348 0.0035 0.0156 0.0392
CCSD(T)=FULL         0.0045           0.0014 0.0029 0.0097 0.0356 0.0037 0.0152 0.0399
STO-3G 3-21G 3-21G* 6-31G 6-31G* 6-31G** 6-31+G** 6-311G* 6-311G** 6-31G(2df,p) TZVP cc-pVDZ cc-pVTZ cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ

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