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 MP4/cc-pVTZ

For ()
  Energy (hartrees)
frozen core -225.3848042
correlated core -225.4230033
difference -0.0381991
  Energy (hartrees)
frozen core -225.3836958
correlated core -225.4230033
difference -0.0393075
  Energy (hartrees)
frozen core -225.3848042
correlated core -225.4217639
difference -0.0369597
  Energy (hartrees)
frozen core -225.3836958
correlated core -225.4217639
difference -0.0380681
  Energy (hartrees)
frozen core -225.3848044
correlated core -225.4230032
difference -0.0381988