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Energy differences between frozen core and full core for QCISD(T)/aug-cc-pVTZ

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -412.7500215
correlated core -412.8212550
difference -0.0712335
  Energy (hartrees)
frozen core -412.7503148
correlated core -412.8212719
difference -0.0709572