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

For C8H18O (1-Octanol)

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 aug-cc-pVDZ
Moller Plesset perturbation MP2=FULL -0.003891 -0.015263 -0.015263 -0.012005 -0.041207 -0.044381 -0.045223 -0.167974 -0.170447 -0.079069 -0.200063 -0.154100 -0.023519 -0.142757 -0.027682
MP3=FULL         -0.040612                    
B2PLYP=FULL -0.001177 -0.004554 -0.004554 -0.003578 -0.012166 -0.013075 -0.013323 -0.048003 -0.048741 -0.022918 -0.057455 -0.044105 -0.006987 -0.041328 -0.008218
Quadratic configuration interaction QCISD(T)=FULL         -0.040702               -0.021994    
Coupled Cluster CCSD=FULL         -0.040247         -0.079678          
CCSD(T)=FULL         -0.040715               -0.021995    
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 aug-cc-pVDZ