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

For BH2NH2 (Boranamine)

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) 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 -0.000830 -0.003077 -0.003077 -0.002479 -0.008258 -0.008892 -0.009077 -0.036148 -0.036598 -0.015297 -0.042909 -0.033414 -0.004616 -0.028831 -0.055812 -0.005473 -0.033787 -0.057113 -0.005628 -0.035163
MP3=FULL         -0.008180   -0.009008       -0.044834 -0.035139 -0.004379 -0.029770         -0.005406 -0.036677
MP4=FULL   -0.002968     -0.008226       -0.038393   -0.045212   -0.004365 -0.029953   -0.005236 -0.035389   -0.005392 -0.036901
B2PLYP=FULL -0.000254 -0.000924 -0.000924 -0.000744 -0.002460 -0.002643 -0.002698 -0.010360 -0.010495 -0.004473 -0.012369 -0.009586 -0.001377 -0.008401   -0.001636 -0.009814   -0.001683 -0.010205
Quadratic configuration interaction QCISD(T)=FULL         -0.008217           -0.045163   -0.004346 -0.029911   -0.005213 -0.035349   -0.005369 -0.036861
Coupled Cluster CCSD=FULL         -0.008118         -0.015412 -0.044756 -0.035132 -0.004280 -0.029639 -0.058339 -0.005139 -0.035066 -0.059723 -0.005293 -0.036570
CCSD(T)=FULL         -0.008217           -0.045157 -0.035335 -0.004346 -0.029913 -0.072287 -0.005213 -0.035350 -0.060258 -0.005369 -0.036862
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