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Energy differences between frozen core and full core for CCSD/TZVP

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -957.8513995
correlated core -957.9213063
difference -0.0699068
  Energy (hartrees)
frozen core -957.8526122
correlated core -957.9224528
difference -0.0698406