Arene ruthenium bis-saccharinato complexes: Synthesis, molecular structure and catalytic oxidation properties in aqueous solution
نویسندگان
چکیده
Arene ruthenium complexes [(h-arene)Ru(sacc)2(OH2)] (arene 1⁄4 para-cymeme, benzene) containing an aqua and two saccharinato ligands have been synthesized from [(h-arene)RuCl2]2 and sodium saccharinate in a water-ethanol mixture (1:1). The aqua complex [(h-MeC6H4Pr)Ru(sacc)2(OH2)] reacts with acetonitrile to give the acetonitrile complex [(h-MeC6H4Pr)Ru(sacc)2(NCMe)]. The corresponding benzene derivative [(h-C6H6)Ru(sacc)2(NCMe)] was obtained from [(h-C6H6)RuCl2]2 and saccNa in an acetonitrile-methanol mixture (1:1). All new complexes show a piano-stool geometry with two monohapto nitrogen-bonded saccharinato ligands in addition to a H2O or MeCN ligand. All complexes of the type [(h-arene)Ru(sacc)2(OH2)] and [(h-arene)Ru(sacc)2(NCMe)] were found to catalyze the oxidation of secondary alcohols with tert-butyl hydroperoxide (BuOOH) to give the corresponding ketones in aqueous solution.
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