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Keywords:

  • cobalt;
  • ligand field theory;
  • photochemistry;
  • UV/Vis spectroscopy;
  • X-ray emission spectroscopy
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d–d excitations in detail: High-resolution 2p3d resonant X-ray emission spectroscopy (RXES) allows the observation of more as well as more intense d–d excitations than UV/Vis spectroscopy does as demonstrated on cobalt(II) carboxylates. Together with ligand field multiplet (LFM) calculations this allows their detailed electronic structure description, while 2p X-ray absorption spectroscopy (XAS) cannot discriminate these transition metal compounds.