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

For SCl+ (sulfur monochloride 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 cc-pV(T+d)Z aug-cc-pV(T+d)Z cc-pCVTZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ
Moller Plesset perturbation MP2=FULL -0.000637 -0.009364 -0.024712 -0.005629 -0.020431 -0.020431 -0.021737 -0.169373 -0.169373 -0.040322 -0.261459 -0.055584 -0.012348 -0.068408 -0.121753 -0.014242 -0.072207 -0.123142 -0.204745 -0.208385 -0.667959 -0.668804 -0.014914 -0.073799
MP3=FULL         -0.019009   -0.023355                       -0.200135 -0.203819 -0.665537 -0.666377    
MP4=FULL                                     -0.202597 -0.206328 -0.669338 -0.670192    
B2PLYP=FULL -0.000213 -0.002900 -0.007489 -0.001743 -0.006177 -0.006177 -0.006570 -0.048845 -0.048845 -0.012094 -0.075817 -0.016399 -0.003774 -0.020437   -0.004344 -0.021518   -0.059935 -0.060966 -0.190438 -0.190691 -0.004545 -0.021974
Quadratic configuration interaction QCISD(T)=FULL         -0.019186           -0.258314   -0.011241 -0.066731   -0.013108 -0.070518   -0.202064 -0.205753 -0.668537 -0.669377 -0.013762 -0.072119
Coupled Cluster CCSD=FULL         -0.018720         -0.036360 -0.255486 -0.053658 -0.010854 -0.065190 -0.118168 -0.012652 -0.068947 -0.119530 -0.199460 -0.203105 -0.663365 -0.664158 -0.013292 -0.070534
CCSD(T)=FULL         -0.019186           -0.258263 -0.054661 -0.011242 -0.066712 -0.120514 -0.013102 -0.070505 -0.121896 -0.202025 -0.205721 -0.668500 -0.669344 -0.013756 -0.072106
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 cc-pV(T+d)Z aug-cc-pV(T+d)Z cc-pCVTZ aug-cc-pCVTZ daug-cc-pVDZ daug-cc-pVTZ