{(μ-L)[RuII(acac)2]2}n, n = 2+, +, 0, −, 2−, with L = 3,3′,4,4′-tetraimino-3,3′,4,4′-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediates
| Autor: | Wolfgang Kaim, Sandeep Ghumaan, Biprajit Sarkar, Srikanta Patra, Stanislav Záliš, Jan Fiedler, Goutam Kumar Lahiri |
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| Rok vydání: | 2004 |
| Předmět: |
Chemistry
Inorganic chemistry Pi-Radicals Electronic structure Intervalence charge transfer Creutz-Taube Ion Electronic-Structure Oxidation-State Ion law.invention Bis(Bipyridine)Ruthenium(Ii) 3 4-Diamino-3' 4'-Diimino-3' 4'-Dihydrobiphenyl Inorganic Chemistry Ruthenium Complexes Paramagnetism Oxidation state law Quinone-Related Ligands Semiquinone Ligands Physical chemistry Transition-Metal Complexes O-Iminothioquinone Electron paramagnetic resonance |
| Zdroj: | Dalton Trans.. :750-753 |
| ISSN: | 1477-9234 1477-9226 |
| DOI: | 10.1039/b315927m |
| Popis: | A complete EPR and UV-Vis-NIR spectroelectrochemical characterisation has been carried out for the series 1(2+/+/0/-/2-) where 1 is the new complex {(mu-L)[Ru-II(acac)(2)](2)}, L = 3,3',4,4'-tetraimino-3,3',4,4'-tetrahydrobiphenyl. The paramagnetic intermediates are identified as the anion radical (L.-) complex 1(.-) with a long-wavelength intra-ligand transition at 2160 nm and as the weakly coupled diruthenium(II,III) species 1(.-) (K-c = 10(3)) with a low-intensity intervalence charge transfer (IVCT) band at 1570 nm. DFT calculations using ADF and Gaussian 03 programs support these assignments. |
| Databáze: | OpenAIRE |
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