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

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -76.2149879
correlated core -76.2281994
difference -0.0132115
  Energy (hartrees)
frozen core -76.2149877
correlated core -76.2281993
difference -0.0132117