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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 -77.1629929
correlated core -77.1984485
difference -0.0354556
  Energy (hartrees)
frozen core -77.1421342
correlated core -77.1763381
difference -0.0342039