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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 MgN atoms 1 and 2

For MgN (Magnesium Nitride)
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 daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.0013 -0.0008 -0.0015 -0.0011 -0.0003 -0.0003 0.0017 0.0002 0.0002 0.0088 0.0048 0.0026 -0.0012 0.0082 0.0163 0.0050 0.0136 0.0141 0.0034 0.0130
MP3=FULL         -0.0004   0.0016       0.0033 0.0019 -0.0013 0.0073         0.0027 0.0149
MP4=FULL   -0.0008     -0.0004       0.0006   0.0091   -0.0013 0.0070   0.0050 0.0148   0.0029 0.0163
B2PLYP=FULL -0.0004 -0.0004 -0.0006 -0.0003 -0.0001 -0.0001 0.0004 0.0001 0.0001 0.0029 0.0024 0.0008 -0.0004 0.0019   0.0021 0.0037   0.0014 0.0056
Quadratic configuration interaction QCISD(T)=FULL         -0.0018           0.0057   -0.0026 0.0128   -0.0005 0.0186   0.0047 0.0237
Coupled Cluster CCSD=FULL         -0.0003         0.0092 0.0092 0.0017 -0.0012 0.0074 0.0160 0.0051 0.0149 0.0218 0.0052 0.0245
CCSD(T)=FULL         -0.0019           0.0052 -0.0036 -0.0018 0.0123 0.0208 -0.0006 0.0180 0.0211 0.0040 0.0229
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 daug-cc-pVDZ daug-cc-pVTZ

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