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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 GeH atoms 1 and 2

For GeH (germylidene)
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 0.0020 0.0004 0.0002 0.0017 0.0025 0.0045 0.0047 0.0076 0.0130 0.0153 0.0138 -0.0002 0.0006 0.0061 0.0219 0.0034 0.0129 0.0304 0.0041 0.0165
MP3=FULL         0.0044   0.0059         -0.0020 0.0005 0.0043            
MP4=FULL   0.0005     0.0025       0.0124       0.0008 0.0062   0.0039 0.0119      
B2PLYP=FULL 0.0011 0.0002 0.0000 0.0007 0.0009 0.0017 0.0017 0.0025 0.0043 0.0051 0.0053 -0.0002 0.0003 0.0019   0.0012 0.0037   0.0014 0.0051
Quadratic configuration interaction QCISD(T)=FULL         0.0022           0.0110     0.0048   0.0037 0.0113   0.0043 0.0151
Coupled Cluster CCSD=FULL         0.0022         0.0143 0.0111 -0.0016 0.0007 0.0051 0.0200 0.0035 0.0107 0.0276 0.0041 0.0150
CCSD(T)=FULL         0.0021           0.0109 -0.0012   0.0048 0.0206 0.0037 0.0111   0.0043 0.0151
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

gehq1.gif