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

For CH2ClCCl3 (1,1,1,2-tetrachloroethane)

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 -0.001151 -0.021162 -0.051337 -0.013919 -0.050612 -0.050996 -0.053613 -0.234497 -0.234881 -0.101890 -0.143711 -0.029812 -0.166698 -0.036275 -0.185694
B2PLYP=FULL -0.000353 -0.006421 -0.015436 -0.004213 -0.015130 -0.015240 -0.016026 -0.067521 -0.067633 -0.030165 -0.041960 -0.009006 -0.049299 -0.010931 -0.054657
Quadratic configuration interaction QCISD(T)=FULL         -0.047424             -0.026759      
Coupled Cluster CCSD=FULL         -0.046384         -0.092580 -0.140565 -0.025911 -0.159301    
CCSD(T)=FULL         -0.047407           -0.142676 -0.026739 -0.162489    
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