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(2df,p)

For ()
  Energy (hartrees)
frozen core -291.7322159
correlated core -291.7380440
difference -0.0058282
  Energy (hartrees)
frozen core -291.7322188
correlated core -291.7380440
difference -0.0058252
  Energy (hartrees)
frozen core -291.7322159
correlated core -291.7380469
difference -0.0058311
  Energy (hartrees)
frozen core -291.7322188
correlated core -291.7380469
difference -0.0058281