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Energy differences between frozen core and all electrons correlated.
MP2, MP3, MP4, B2PLYP, CCSD, and CCSD(T)

For AsCl3 (Arsenous trichloride)

Energies in Hartree
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 aug-cc-pVDZ aug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.000661 -0.017330 -0.047618 -0.021517 -0.066766 -0.066766 -0.069790 -0.530315 -0.530315 -0.168144 -0.183119 -0.028491 -0.157267 -0.034581 -0.170464
MP3=FULL         -0.061793   -0.064699       -0.160799 -0.024738 -0.142931    
MP4=FULL   -0.016095     -0.064574       -0.512583     -0.026185 -0.152241 -0.032229 -0.165041
B2PLYP=FULL -0.000233 -0.005281 -0.014452 -0.006534 -0.020855 -0.020855 -0.021761 -0.157032 -0.157032 -0.052231 -0.054499 -0.008762 -0.047152 -0.010601 -0.050937
Quadratic configuration interaction QCISD(T)=FULL         -0.064151             -0.025902 -0.149320 -0.031818 -0.161879
Coupled Cluster CCSD=FULL         -0.062192         -0.153262 -0.166173 -0.024792 -0.145103 -0.030475 -0.157436
CCSD(T)=FULL         -0.064131           -0.169974 -0.025889 -0.187305 -0.031782 -0.161705
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 aug-cc-pVDZ aug-cc-pVTZ