Polynuclear nitrido-complexes of osmium, ruthenium, and iridium

Abstract

The preparation and physical properties are reported of a number of new binuclear µ-nitrido-complexes of osmium and ruthenium, of the form [M₂^IVNX₈(H₂O)₂]^3–(M = Os or Ru; X = Cl or Br); [Ru₂N(NCS)₈(H₂O)₂]^3–; [Ru₂N(NO₂)₆(OH)₂(H₂O)₂]^3–; [Os₂N(NH₃)₈X₂]³⁺(X = Cl, Br, l, NCS, NO₃, or N₃); [Ru₂N(NH₃)₈X₂]³⁺(X = Cl, Br, or NO₃); [Ru₂N(NH₃)₆X₃(H₂O)]²⁺(X = Cl, NCS, or N₃). The vibrational spectra suggest that these structures contain linear M–N–M units. Studies of the vibrational spectra of the trimeric species Os₃N₃(NH₃)₄(OH)₉ and salts containg the [Ir₃N(SO₄)₆(H₂O)₃]^4–,[Ir₃N(SO₄)₆(OH)₃]^7–, and [Ir₃NCl₁₂(H₂O)₃]^4– ions are also reported. The vibrational spectra of mono- and poly-nuclear nitrido-complexes are compared with those of the analogous oxy-systems.