Options
Arene ruthenium bis-saccharinato complexes: Synthesis, molecular structure and catalytic oxidation properties in aqueous solution
Auteur(s)
Elsevier
Date Issued
2011
Journal
Journal of Organometallic Chemistry
Vol.
696
No
21
From page
3285
To page
3291
Abstract
Arene ruthenium complexes [(η<sup>6</sup>-arene)Ru(sacc)<sub>2</sub>(OH<sub>2</sub>)] (arene = <i>para</i>-cymeme, benzene) containing an aqua and two saccharinato ligands have been synthesized from [(η<sup>6</sup>-arene)RuCl<sub>2</sub>]<sub>2</sub> and sodium saccharinate in a water-ethanol mixture (1:1). The aqua complex [(η<sup>6</sup>-MeC<sub>6</sub>H<sub>4</sub>Pr<sup><i>i</i></sup>)Ru(sacc)<sub>2</sub>(OH<sub>2</sub>)] reacts with acetonitrile to give the acetonitrile complex [(η<sup>6</sup>-MeC<sub>6</sub>H<sub>4</sub>Pr<sup><i>i</i></sup>)Ru(sacc)<sub>2</sub>(NCMe)]. The corresponding benzene derivative [(η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)Ru(sacc)<sub>2</sub>(NCMe)] was obtained from [(η<sup>6</sup>-C<sub>6</sub>H<sub>6</sub>)RuCl<sub>2</sub>]<sub>2</sub> and saccNa in an acetonitrile-methanol mixture (1:1). All new complexes show a piano-stool geometry with two mono-hapto nitrogen-bonded saccharinato ligands in addition to a H<sub>2</sub>O or MeCN ligand. All complexes of the type [(η<sup>6</sup>-arene)Ru(sacc)<sub>2</sub>(OH<sub>2</sub>)] and [(η<sup>6</sup>-arene)Ru(sacc)<sub>2</sub>(NCMe)] were found to catalyze the oxidation of secondary alcohols with <i>tert</i>-butyl hydroperoxide (Bu<sup><i>t</i></sup>OOH) to give the corresponding ketones in aqueous solution.
Publication type
journal article
