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

For V+ (Vanadium atom 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
Moller Plesset perturbation MP2=FULL -0.054990 -0.104122 -0.104122 -0.111026 -0.162667 -0.162667 -0.182008 -0.388038 -0.388038 -0.214339 -0.465543 -0.185333 -0.166079 -0.327740 -0.393023 -0.166079 -0.309702 -0.394024
MP3=FULL         -0.175201   -0.193851       -0.470681 -0.196232 -0.177765 -0.318482        
MP4=FULL   -0.118350     -0.179363       -0.400366   -0.480173   -0.182770 -0.326771   -0.182770 -0.328432  
B2PLYP=FULL -0.017468 -0.033048 -0.033048 -0.035447 -0.051656 -0.051656 -0.057634 -0.117506 -0.117506 -0.066998 -0.140542 -0.058515 -0.053166 -0.109255   -0.053166 -0.088252  
Quadratic configuration interaction QCISD(T)=FULL         -0.179696           -0.476525   -0.182989 -0.333407   -0.182989 -0.341636  
QCISD(TQ)=FULL         -0.179790   -0.198868       -0.476549   -0.182961 -0.335479 -0.406618 -0.182961 -0.346744 -0.407549
Coupled Cluster CCSD=FULL         -0.176836         -0.230680 -0.467384 -0.198834 -0.179580 -0.325849 -0.396908 -0.179580 -0.329702 -0.397809
CCSD(T)=FULL         -0.179608           -0.476464 -0.201675 -0.182858 -0.351477 -0.406529 -0.182858 -0.337081 -0.407470
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