Ruthenium-99 Mössbauer study of ruthenium red and its derivatives

Abstract

A ⁹⁹Ru Mössbauer study of the ions [Ru₃(O)₂(NH₃)₁₄]ⁿ⁺(n= 6 or 7) and their ethylenediamine (en) substituted derivatives, [Ru₃(O)₂(NH₃)₁₀(en)₂]ⁿ⁺, has been carried out. The results support earlier proposals regarding the distribution of valence electrons on the ruthenium centres for the reduced species (n= 6). For the oxidised complexes (n= 7), however, they reveal a delocalisation of the odd electron amongst the three ruthenium centres.