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Dinuclear ruthenium sawhorse-type complexes containing carboxylato bridges and ferrocenyl substituents: Synthesis and electrochemistry
Auteur(s)
Date de parution
2007
In
Inorganica Chimica Acta, Elsevier, 2007/360/6/2023-2028
Résumé
The ferrocenyl-containing diruthenium complexes [Ru<sub>2</sub>(CO)<sub>4</sub>(μ<sub>2</sub>-η<sup>2</sup>-OOCFc)<sub>2</sub>L<sub>2</sub>] (Fc = ferrocenyl, fc = ferrocen-1,1′-diyl; <b>1</b>: L = NC<sub>5</sub>H<sub>4</sub>–COOC<sub>6</sub>H<sub>4</sub>–OC<sub>10</sub>H<sub>21</sub>, <b>2</b>: L = NC<sub>5</sub>H<sub>4</sub>–COOC<sub>6</sub>H<sub>4</sub>–OC<sub>16</sub>H<sub>33</sub>, <b>3</b>: L = NC<sub>5</sub>H<sub>4</sub>–OOC–fc–C<sub>12</sub>H<sub>25</sub>) and [Ru<sub>2</sub>(CO)<sub>4</sub>(μ<sub>2</sub>-η<sup>2</sup>-OOC<sub>6</sub>H<sub>5</sub>)<sub>2</sub>(NC<sub>5</sub>H<sub>4</sub>–OOC–fc–C<sub>12</sub>H<sub>25</sub>)<sub>2</sub>] (<b>4</b>) have been synthesized from Ru<sub>3</sub>(CO)<sub>12</sub>, ferrocene carboxylic or benzoic acid and the corresponding pyridine derivative. The synthesis of the new pyridine derivative NC<sub>5</sub>H<sub>4</sub>–OOC–fc–C<sub>12</sub>H<sub>25</sub> used for the preparation of <b>3</b> and <b>4</b> is also reported. Complexes <b>1–4</b> posses a so-called sawhorse structure consisting of the Ru<sub>2</sub>(CO)<sub>4</sub> backbone and two bridging carboxylato ligands, while the coordination sphere around the ruthenium atoms is completed by the pyridine-derived ligands bonded in the axial positions. The electrochemical behavior of <b>1–4</b> and their known analogues [Ru<sub>2</sub>(CO)<sub>4</sub>(μ<sub>2</sub>-η<sup>2</sup>-OOCFc)<sub>2</sub>L<sub>2</sub>] (<b>5</b>: L = NC<sub>5</sub>H<sub>5</sub>, <b>6</b>: L = P(C<sub>6</sub>H<sub>5</sub>)<sub>3</sub>, <b>7</b>: L = NC<sub>5</sub>H<sub>4</sub>–OOCFc) has been studied by voltammetry on rotating disc electrode and by cyclic voltammetry.
Identifiants
Type de publication
journal article
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