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#! Extrapolated energies with delta correction


molecule hf {
    F
    H 1 0.92
}

# Get a reasonable guess, to save some iterations
set {
    scf_type      df
    mp2_type      df
    e_convergence 7
    reference     rhf
}

hf.update_geometry()

# Equivalence tests
mp3_energy = energy('MP3/cc-pVDZ')
mp3_energy_delta = energy('MP2/cc-pVDZ + D:MP3/cc-pVDZ')

ccsd_energy_delta = energy('MP2/cc-pVDZ + D:CCSD/cc-pVDZ')
ccsd_energy = energy('CCSD/cc-pVDZ')

ccsd_t_energy_delta = energy('CCSD/cc-pVDZ + D:CCSD(T)/cc-pVDZ')
ccsd_t_energy = energy('CCSD(T)/cc-pVDZ')

ccsd_t_energy_delta = energy('CCSD/cc-pV[DT]Z + D:CCSD(T)/cc-pV[DT]Z')
ccsd_t_energy = energy('CCSD(T)/cc-pV[DT]Z')

# Extrapolation test
cbs1_energy = energy('MP2/cc-pV[DT]Z + D:CCSD(T)/cc-pVDZ')

# Need higher angular momentum to do more