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

For SiH3Br (bromosilane)

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 -0.003600 -0.008901 -0.022912 -0.014013 -0.037784 -0.038701 -0.040266 -0.518357 -0.519098 -0.103424 -0.098584 -0.015214 -0.105836 -0.019691 -0.114912
MP3=FULL         -0.035683   -0.038153       -0.087688 -0.013830 -0.099314    
B2PLYP=FULL -0.001182 -0.002784 -0.007106 -0.004194 -0.011648 -0.011917 -0.012390 -0.152122 -0.152345 -0.031906 -0.029486 -0.004739 -0.031876 -0.006102 -0.034496
Quadratic configuration interaction QCISD(T)=FULL         -0.036625             -0.014492 -0.103760 -0.018922 -0.112645
Coupled Cluster CCSD=FULL         -0.035781         -0.096823 -0.090451 -0.013889 -0.100978 -0.018155 -0.109808
CCSD(T)=FULL         -0.036604           -0.092854 -0.014483 -0.103643 -0.018900 -0.112518
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