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

19 06 19 13 52
For SF (Monosulfur monofluoride)
  Energy (hartrees)
frozen core -77.0593022
correlated core -77.0892415
difference -0.0299394
  Energy (hartrees)
frozen core -77.1204458
correlated core -77.1487143
difference -0.0282685