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

For SiF (silicon monofluoride)

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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z cc-pCVTZ aug-cc-pCVTZ
Moller Plesset perturbation MP2=FULL -0.002118 -0.007721 -0.014774 -0.004907 -0.013157 -0.013157 -0.014759 -0.143036 -0.143036 -0.026368 -0.050086 -0.008181 -0.067741 -0.074599 -0.009471 -0.071370 -0.076673 -0.119216 -0.373519 -0.374016
MP3=FULL         -0.012772   -0.030326       -0.050406 -0.007790 -0.067576         -0.119655 -0.376962 -0.377460
MP4=FULL   -0.007418     -0.012931       -0.143664     -0.007857 -0.068834   -0.009185 -0.072533   -0.121515 -0.379176 -0.379655
B2PLYP=FULL -0.000697 -0.002392 -0.004586 -0.001517 -0.004046 -0.004046 -0.004532 -0.041675 -0.041675 -0.008049 -0.014753 -0.002520 -0.020297   -0.002912 -0.021345   -0.035538 -0.107463 -0.107619
Quadratic configuration interaction QCISD(T)=FULL         -0.012835             -0.007808 -0.068669   -0.009133 -0.072378   -0.121109 -0.378744 -0.379234
QCISD(TQ)=FULL         -0.012832   -0.014471         -0.007806 -0.068568 -0.076428 -0.009124 -0.072289 -0.078505      
Coupled Cluster CCSD=FULL         -0.012556         -0.025435 -0.050265 -0.007614 -0.067397 -0.075211 -0.008899 -0.071107 -0.077255 -0.119180 -0.375513 -0.375978
CCSD(T)=FULL         -0.012838           -0.050997 -0.007813 -0.068648 -0.076453 -0.009135 -0.072361 -0.078528 -0.121052 -0.378730 -0.379224
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 cc-pVQZ aug-cc-pVDZ aug-cc-pVTZ aug-cc-pVQZ cc-pV(T+d)Z cc-pCVTZ aug-cc-pCVTZ