Research Article: [(E)-Oxido(pyridin-2-yl­methyl­idene)amine-κ2N,N′][(E)-N-(pyridin-2-yl­methyl­idene)hydroxyl­amine-κ2N,N′]silver(I) perchlorate–bis­[(E)-N-(pyridin-2-yl­methyl­idene)hydroxyl­amine-κ2N,N′]silver(I) (1/1)

Date Published: May 01, 2012

Publisher: International Union of Crystallography

Author(s): Jing Xu, Shan Gao, Seik Weng Ng, Edward R. T. Tiekink.


In the title salt co-crystal, [Ag(C6H5N2O)(C6H6N2O)]ClO4·[Ag(C6H6N2O)2], the asymmetric unit comprises a [Ag(LH)2]+ cation, a perchlorate anion and a neutral (LH)AgL mol­ecule, where LH is pyridine-2-carboxaldoxime. Both silver-containing species feature N,N′-chelating LH and L ligands, which define an N4 donor set that is highly distorted [dihedral angles between AgC2N2 chelate rings = 45.7 (3) and 44.3 (2)°, respectively] owing, in part, to the close approach of a neighbouring Ag atom, leading to an argentophilic inter­action [Ag⋯Ag = 3.1868 (11) Å]. The mol­ecular conformations are stabilized by intra­molecular O—H⋯O hydrogen bonds. In the crystal, O—H⋯O inter­actions lead to supra­molecular chains along [010]. Chains aggregate into layers in the ab plane, defining channels along [100] in which reside the perchlorate anions; the latter are disordered over two overlapped orientations in a 50:50 ratio.

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For structural diversity in the structures of silver salts, see: Kundu et al. (2010 ▶). For a related structure, see: Abu-Youssef et al. (2010 ▶).