National Institute of Standards and Technology
Computational Chemistry Comparison and Benchmark DataBase
Release 22May 2022
NIST Standard Reference Database 101
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III.G.10.a.

Energy differences between frozen core and full core for B2PLYP/6-31G

For ()
  Energy (hartrees)
frozen core -579.6797856
correlated core -579.6822187
difference -0.0024331
  Energy (hartrees)
frozen core -579.7142833
correlated core -579.7166947
difference -0.0024114
  Energy (hartrees)
frozen core -579.7165955
correlated core -579.7189957
difference -0.0024002
  Energy (hartrees)
frozen core -579.7138941
correlated core -579.7163123
difference -0.0024183