| Abstrakt: |
The geometrical isomers, cis-dichlovo-trans-(methanol) (hydroquinone) (2,2'-bipyridine)ruthenium(II) and cis-dichlovo-cis-(methanol)(hydroquinone)(2,2'-bipyridine)ruthenium(II), [RuCl2(MeOH)(QH2)bipy] (complex I and II), were synthesized by reduction and substitution reactions of [RuO4bipy] and [RuO2(OH)2bipy] with hydroquinone in hydrochloric acid solution, and methanol. cis-Chloro(hydroquinonato)bis(2,2'-bipyridine)-ruthenium(II), cis-[RuCl(QH)(bipy)2], was obtained from the substitution reaction of complex I or II with 2,2'-bipyridine in methanol, and cis-chloro(hydroquinone)bis(2,2'-bipyridine)ruthenium(II) chloride, cis-[RuCl(QH2)-(bipy)2]Cl, was also obtained from the substitution of cis-trans-[RuCl2(MeOH)(QH2)bipy] in methanol containing hydrochloric acid. cis-Dihydroxobis(2,2'-bipyridine)ruthenium(II),cis-[Ru(OH)2(bipy)2], was obtained by heating an aqueous solution of cis-[RuCl (QH) (bipy) 2]. Trihydroxoaquo (1,10-phenanthroline) ruthenium (III), [Ru(OH)3(H2O)phen] was also synthesized from [RuO3phen]2O and [Ru(OH)3phen]2O by reduction reactions similar to those used for [RuCl2(MeOH)(QH2)bipy]. These complexes were characterized by the infrared, visible and ultraviolet absorption spectra, and also by polarographic and magnetic measurements. The structures are discussed. |
