Crystal structure of π-cyanido-12κ2NC-dicyanido-1κC,2κC-bis(quinolin-8-amine-1κ2N,N')-2-silver(I)-1-silver(II) rare occurrence of a mixed-valence AgI,II compound

Abstract : The title dinuclear complex, [Ag2(CN)3(C9H8N2)2], may be considered as an AgII compound with the corresponding metal site coordinated by two bidentate quinolin-8-amine molecules, one cyanide group and one dicyanidoargentate(I) anion, [Ag(CN)2]-. Since this latter ligand contains an AgI atom, the complex should be a class 1 or class 2 mixed-valence compound, according to the Robin- Day classification. The AgII atom is six-coordinated in a highly distorted octahedral geometry, while the AgI atom displays the expected linear geometry. In the crystal, the amino groups of the quinolin-8-amine ligands form N-H⋯N hydrogen bonds with the N atoms of the non-bridging cyanide ligands, forming a two-dimensional network parallel to (102). The terminal cyanide ligands are not engaged in polymeric bonds and the title compound is an authentic molecular complex. The title molecule is thus a rare example of a stable AgI,II complex, and the first mixed-valence AgI,II molecular complex characterized by X-ray diffraction.
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Soumis le : lundi 15 juillet 2019 - 18:06:54
Dernière modification le : mardi 16 juillet 2019 - 01:28:02

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Z. Setifi, S. Bernès, O. Perez, F. Setifi, D.-A. Rouag. Crystal structure of π-cyanido-12κ2NC-dicyanido-1κC,2κC-bis(quinolin-8-amine-1κ2N,N')-2-silver(I)-1-silver(II) rare occurrence of a mixed-valence AgI,II compound. Acta Crystallographica Section E Crystallographic Communications, 2015, 71, pp.698-701. ⟨10.1107/S2056989015009664⟩. ⟨hal-02184179⟩

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