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

For BF3+ (boron trifluoride cation)

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 -0.000541 -0.006742 -0.006742 -0.004340 -0.012264 -0.012264 -0.013465 -0.073463 -0.073463 -0.027394 -0.090369 -0.066674 -0.008112 -0.051398 -0.118468 -0.009936 -0.058780 -0.120432 -0.010256 -0.061592
MP3=FULL         -0.011882   -0.013093       -0.092821 -0.068726 -0.007559 -0.051623         -0.009778 -0.062649
MP4=FULL   -0.006367     -0.012081       -0.075366   -0.093222   -0.007626 -0.051766   -0.009498 -0.059726   -0.009819 -0.062770
B2PLYP=FULL -0.000171 -0.001981 -0.001981 -0.001283 -0.003635 -0.003635 -0.003974 -0.020759 -0.020759 -0.007711 -0.025647 -0.018853 -0.002379 -0.014814   -0.002931 -0.016927   -0.003024 -0.017724
Quadratic configuration interaction QCISD(T)=FULL         -0.012054           -0.093278   -0.007602 -0.051864   -0.009497 -0.059924   -0.009820 -0.062989
Coupled Cluster CCSD=FULL         -0.011903         -0.027386 -0.092602 -0.068745 -0.007503 -0.051421 -0.121472 -0.009383 -0.059443   -0.009702 -0.062492
CCSD(T)=FULL         -0.012046           -0.093261 -0.069037 -0.007596 -0.051856 -0.122384 -0.009490 -0.059902   -0.009812 -0.062963
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