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Energy differences between frozen core and full core for CCSD(T)/TZVP

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -597.0077463
correlated core -597.0704623
difference -0.0627161
  Energy (hartrees)
frozen core -597.0366000
correlated core -597.0995071
difference -0.0629072