Synthesis and properties of the binuclear complexes and
1979; Elsevier BV; Volume: 33; Linguagem: Inglês
10.1016/s0020-1693(00)89453-0
ISSN1873-3255
AutoresAndrew Yeh, Albert Haim, Martin E. Tanner, Andreas Lüdi,
Tópico(s)Lanthanide and Transition Metal Complexes
ResumoThe binuclear complexes (NC5FeLM(NH3)5 (L = 4,4′bipyridine, M =Ru, Rh) were prepared by the rapid reaction between M(NH3)5L3+ and Fe(CN)5OH3−2. The compound Na[(NC)5FeL′Ru(NH3)5] (L′ = pyrazine) was prepared by the reaction between Fe(CN)5NH3−3 and ru(NH3)5L2+. Oxidation of Na[(NC)5FeL′Ru(NH3)5] with cerium(IV) or peroxydisulfate yielded (NC)5FeL′Ru(NH3)5. The reaction between Fe(CN)5NH3−3 and Rh(NH3)5L′3+ produced (NC)5FeL′Rh(NH3)5. Cobalt analogs of the FeRu complexes were prepared by reaction of Co(CN)5OH3−2 with Ru(NH3)5L2+ and Ru(NH3)5LL′2+. The compounds were characterized by solid state spectroscopic measurements (KBr pellets) in the visible, near infrared, and infrared regions. The wavelengths of the maxima of the metal to ligand charge transfer bands, cyanide stretching bands and ammonia deformation bands of the title compounds, and comparisons with the corresponding bands of their rhodium and cobalt analogs, are used to assign a valence-trapped formulation with localized iron(II) and ruthenium(III) oxidation states to the title com[ounds
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