dd transition

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As dd junction a is electron exchange between two d orbitals within an atom designated. This effect is often responsible for the color in metallic complexes .

This transition describes the energetic increase of a valence electron in a d orbital. In this way the electron is transferred to an energetically higher d-orbital of the same atom. This process takes place without a spin reversal . (Compare charge transfer complexes .) Light of a certain wavelength is absorbed. The perceived color is the complementary color .

Tanabe-Sugano diagrams illustrate actual energy levels .

Example titanium (III)

Titan (III) still has exactly one d electron. This results in the following arrangement in an octahedral ligand field : normal: one electron in t2g; after absorption: one electron in eg * with the same spin.

literature

  • Theodore L. Brown, H. Eugene LeMay, Bruce E. Bursten: Chemistry: Studying compact . 10th edition. Pearson Studies, 2011, ISBN 3-86894-122-3 . on-line
  • R. Glaum, M. Hitchman: On the Bonding Behavior of Transition Metal Ions in Inorganic Solids , Australian Journal of Chemistry online (English)