Iodine-127 nuclear magnetic resonance spectra of transition-metal periodate complexes

Abstract

¹²⁷ I N.m.r. spectra have been recorded in solution for [M{IO₅(OH)}₂]^5–(M = Cu, Ag, or Au), [MO₂{IO₅(OH)}₂]^6–(M = Ru or Os), [Co₄I₃O₂₄H₁₂]^3–, and in addition for H₅IO₆, NaIO₄, and [I(OH)₆]⁺. The presence of a very broad resonance at ca. 2 800–3 100 p.p.m. is suggested to be characteristic of the presence of an orthoperiodate group [H_5^–n^–IO₆]^n–. The syntheses and properties of Na₆[OsO₂L₂]·nH₂O [L = IO₅(OH) or TeO₄(OH)₂] are reported.