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 MP3/6-31+G**

For (Chlorine trifluoride oxide)
  Energy (hartrees)
frozen core -113.6985003
correlated core -113.7214536
difference -0.0229533
  Energy (hartrees)
frozen core -113.7078745
correlated core -113.7214536
difference -0.0135792
  Energy (hartrees)
frozen core -113.6985003
correlated core -113.7214538
difference -0.0229534
  Energy (hartrees)
frozen core -113.7078745
correlated core -113.7214538
difference -0.0135793
  Energy (hartrees)
frozen core -113.7078912
correlated core -113.7214540
difference -0.0135628
  Energy (hartrees)
frozen core -113.7078912
correlated core -113.7214540
difference -0.0135628