Arene ruthenium bis-saccharinato complexes: Synthesis, molecular structure and catalytic oxidation properties in aqueous solution
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J. Organomet. Chem.
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Arene ruthenium complexes [(?6-arene)Ru(sacc)2(OH2)] (arene = para-cymeme, benzene) contg. an aqua and two saccharinato ligands have been synthesized from [(?6-arene)RuCl2]2 and sodium saccharinate in a water-ethanol mixt. (1:1). The aqua complex [(?6-MeC6H4Pri)Ru(sacc)2(OH2)] reacts with acetonitrile to give the acetonitrile complex [(?6-MeC6H4Pri)Ru(sacc)2(NCMe)]. The corresponding benzene deriv. [(?6-C6H6)Ru(sacc)2(NCMe)] was obtained from [(?6-C6H6)RuCl2]2 and saccNa in an acetonitrile-methanol mixt. (1:1). All new complexes show a piano-stool geometry with two mono-hapto nitrogen-bonded saccharinato ligands in addn. to a H2O or MeCN ligand. All complexes of the type [(?6-arene)Ru(sacc)2(OH2)] and [(?6-arene)Ru(sacc)2(NCMe)] were found to catalyze the oxidn. of secondary alcs. with tert-Bu hydroperoxide (ButOOH) to give the corresponding ketones in aq. soln. [on SciFinder(R)]
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