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Dinuclear ruthenium sawhorse-type complexes containing bridging ligands with ferrocenyl substituents in <i>endo/endo</i>, <i>endo/exo</i> and <i>exo/exo</i> orientations
Auteur(s)
Auzias, Mathieu
Labat, Gaël
Date de parution
2006
In
Inorganica Chimica Acta, 2006/359/1012-1017
Résumé
The dinuclear ruthenium complexes Ru<sub>2</sub>(CO)<sub>4</sub>(OOCC<sub>5</sub>H<sub>4</sub>FeC<sub>5</sub>H<sub>5</sub>)<sub>2</sub>L<sub>2</sub> (L = NC<sub>5</sub>H<sub>5</sub>: 1, L = PPh<sub>3</sub>: 2) have been synthesized from Ru<sub>3</sub>(CO)<sub>12</sub>, ferrocene carboxylic acid and pyridine or triphenylphosphine, respectively. The single-crystal X-ray structure analysis reveals for 1 and 2 a Ru<sub>2</sub>(CO)<sub>4</sub> sawhorse backbone with the two ferrocenyl substituents of the two carboxylato bridges being <i>endo/exo</i> with respect to each other in the solid state. With the new pyridine derivative NC<sub>5</sub>H<sub>4</sub>OOCC<sub>5</sub>H<sub>4</sub>FeC<sub>5</sub>H<sub>5</sub> (4-ferrocenoyl pyridine) (3) as axial ligand, the complex Ru<sub>2</sub>(CO)<sub>4</sub>(OOCC<sub>5</sub>H<sub>4</sub>FeC<sub>5</sub>H<sub>5</sub>)<sub>2</sub>(NC<sub>5</sub>H<sub>4</sub>OOCC<sub>5</sub>H<sub>4</sub>FeC<sub>5</sub>H<sub>5</sub>)<sub>2</sub> (4) was obtained, the single crystal X-ray structure analysis showing an <i>exo/exo</i> orientation of the two carboxylato bridges in the solid state. The <i>endo/endo</i> orientation is found in the solid-state structure of Ru<sub>2</sub>(CO)<sub>4</sub>(HNOCC<sub>5</sub>H<sub>4</sub>FeC<sub>5</sub>H<sub>5</sub>)<sub>2</sub>(PPh<sub>3</sub>)<sub>2</sub> (5), the two OCNH bridges being transoïd with respect to each other; this complex is accessible from Ru<sub>3</sub>(CO)<sub>12</sub>, ferrocenamide and triphenylphosphine.
Identifiants
Type de publication
journal article
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