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

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -761.5854262
correlated core -761.8835120
difference -0.2980857
  Energy (hartrees)
frozen core -761.5854262
correlated core -761.8828272
difference -0.2974010