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

For AsCl (Arsenic monochloride)

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
Moller Plesset perturbation MP2=FULL -0.000269 -0.008021 -0.022514 -0.014590 -0.043857 -0.043857 -0.045303 -0.432524 -0.432524 -0.121630 -0.126995 -0.015151 -0.085389 -0.137930 -0.018020 -0.091041 -0.140543
MP3=FULL         -0.041423   -0.042823       -0.107047 -0.013264 -0.075497        
MP4=FULL   -0.007581     -0.043355       -0.414687     -0.014267 -0.082964   -0.017139 -0.088437  
B2PLYP=FULL -0.000100 -0.002449 -0.006912 -0.004411 -0.013945 -0.013945 -0.014376 -0.128789 -0.128789 -0.038408 -0.038036 -0.004727 -0.025859   -0.005602 -0.027504  
Quadratic configuration interaction QCISD(T)=FULL         -0.043034             -0.014057 -0.080490   -0.016855 -0.085782  
QCISD(TQ)=FULL         -0.042742   -0.044166         -0.013873 -0.079166 -0.131454 -0.016606 -0.086340  
Coupled Cluster CCSD=FULL         -0.041731         -0.112553 -0.112664 -0.013400 -0.077690 -0.126759 -0.016065 -0.082917 -0.129079
CCSD(T)=FULL         -0.042996           -0.115470 -0.014042 -0.080338 -0.130055 -0.016827 -0.085624 -0.132404
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