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Energy differences between frozen core and full core for CCSD/daug-cc-pVTZ

19 06 19 13 52
For (cyclohexanamine)
  Energy (hartrees)
frozen core -151.6625299
correlated core -151.7155877
difference -0.0530579
  Energy (hartrees)
frozen core -151.6650243
correlated core -151.7172924
difference -0.0522681