| Abstrakt: |
Five novel neutral complexes of ruthenium(VI) and ruthenium(IV) with 2,2′-bipyridine and 1,10-phenanthroline, [RuO2(OH)2bipy]·3H2O, [Ru(OH)3phen]2O, [RuO2bipy2]·3H2O, [RuO2bipy·phen]·3H2O and [RuO2phen2], were prepared and characterized by a study of their infrared, visible and ultraviolet absorption spectra, and by polarographic measurements. [RuO2(OH)2bipy] and [Ru(OH)3phen]2O were obtained by the reduction of previously-reported complexes, [RuO4bipy] and [RuO3phen]2O respectively, with methanol, and [RuO2bipy2], [RuO2bipy·phen] and [RuO2phen2], by the reactions of [RuO4bipy] and [RuO3phen]2O in methanol with 2,2′-bipyridine and 1,10-phenanthroline respectively. [RuO2bipy·phen] and [RuO2phen2] were also obtained in methanol by the substitution reactions of [RuO2bipy2] and [RuO2bipy·phen] with 1,10-phenanthroline respectively. The five complexes were all diamagnetic. [RuO2(OH)2bipy] was assumed to be a “ruthenyl” complex with two oxide ions coordinated at the transpositions, like such well-known trans-dioxoruthenyl analogues as Cs2[RuO2Cl4] and [RuO2(OH)2(NH3)2], and [Ru(OH)3phen]2O was assumed to be a binuclear complex with an oxygen-bridge between ruthenium atoms. [RuO2bipy2], [RuO2bipy·phen], and [RuO2phen2] were assumed to be mononuclear complexes with two oxide ions coordinated at the transpositions, and their oxidation numbers were found polarographically, to be 4. |
