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 MP2/cc-pVTZ

For ()
  Energy (hartrees)
frozen core -225.3389973
correlated core -225.3775034
difference -0.0385061
  Energy (hartrees)
frozen core -225.3389973
correlated core -225.3790338
difference -0.0400365
  Energy (hartrees)
frozen core -225.3408228
correlated core -225.3775034
difference -0.0366806
  Energy (hartrees)
frozen core -225.3408228
correlated core -225.3790338
difference -0.0382110
  Energy (hartrees)
frozen core -225.3389970
correlated core -225.3775035
difference -0.0385064