Joint spectroscopic and theoretical investigations of transition metal complexes involving non-innocent ligands |
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Authors: | Ray Kallol Petrenko Taras Wieghardt Karl Neese Frank |
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Institution: | Institut für Physikalische und Theoretische Chemie, Universit?t Bonn, Wegelerstrasse 12, D-53115 Bonn, Germany. |
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Abstract: | A series of transition metal complexes involving non-innocent o-dithiolene and o-phenylenediamine ligands has been characterized in detail by various spectroscopic methods like magnetic circular dichroism (MCD), absorption (abs), resonance Raman (rR), electron paramagnetic resonance (EPR), and sulfur K-edge X-ray absorption spectroscopies. A computational model for the electronic structure of the complexes is then proposed based on the density functional theory (DFT) or ab-initio methods, which can successfully account for the observed trends in the experimental spectra (MCD, rR, and abs) of the complexes. Based on these studies, the innocent vs non-innocent nature of the ligands in a given transition metal complex is found to be dependent on the position of the central metal ion in the periodic table, its effective nuclear charge in interplay with relativistic effects. |
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