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

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For ()
  Energy (hartrees)
frozen core -580.4484231
correlated core -580.5407447
difference -0.0923216
  Energy (hartrees)
frozen core -580.4488588
correlated core -580.5410356
difference -0.0921769
  Energy (hartrees)
frozen core -580.4125253
correlated core -580.5042995
difference -0.0917742