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Energy differences between frozen core and full core for MP4/cc-pVTZ

19 06 19 13 52
For ()
  Energy (hartrees)
frozen core -77.0600241
correlated core -77.0900427
difference -0.0300186
  Energy (hartrees)
frozen core -77.1214239
correlated core -77.1497381
difference -0.0283142