A dynamic ligand field theory for vibronic structures rationalizing electronic spectra of transition metal complex compounds

  • Hans-Herbert Schmidtke
  • Joachim Degen
Conference paper
Part of the Structure and Bonding book series (STRUCTURE, volume 71)


A ligand field model which considers the dynamics of vibrating ligands of transition metal ions is formulated, maintaining fundamental assumptions and model parameters of common (static) ligand field theory. It allows a survey to be obtained on corresponding theoretical approaches available on various occasions in the literature which interpret vibrational fine structures of band progressions in electronic absorption and emission spectra including the entanglements caused by Jahn-Teller effects. In the unified model the electronic d-states are vibronically coupled to the nuclei moving in a harmonic force field applying first order perturbation terms in the Herzberg-Teller approximation. The linear vibronic coupling constants, stabilization energies and geometric distortions due to excitation can be calculated from appropriate ligand field parameters of the ground state which are obtained by comparison with the measured spectra and from metal-ligand atomic equilibrium distances. The model is applied to systems of octahedral symmetry representing d-electron coupling with α1, ɛ and/or τ2 vibrations for which well resolved vibronic spectra have been reported.


Stabilization Energy Configuration Interaction Potential Energy Curve Ligand Field Coupling Case 
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Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • Hans-Herbert Schmidtke
    • 1
  • Joachim Degen
    • 1
  1. 1.Institut für Theoretische Chemie der Universität DüsseldorfDüsseldorf 1Germany

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