Poly[(μ-2,3-diethyl-7,8-di-methyl-quinoxaline-κ2N: N)(2,3-diethyl-7,8-di-methyl-quinoxaline-κ N)-μ-nitrato-κ2O: O'-nitrato-κ2O, O'-disilver(I)]

Abstract

The structure of the title compound, [C₁₄H₁₈N₂)₂Ag₂](NO₃)₂, contains subtle differences in ligand, metal, and counter-anion coordination. One quinoxaline ligand uses one of its quinoxaline N atoms to bond to one silver cation. That silver cation is bound to a second quinoxaline which, in turn, is bound to a second silver atom; thereby using both of its quinoxaline N atoms. A nitrate group bonds with one of its O atoms to the first silver and uses the same oxygen to bond to a silver atom (related by symmetry to the second), thereby forming an extended network. The second nitrate group on the other silver bonds via two nitrate O atoms; one silver cation therefore has a coordination number of three whereas the second has a coordination number of four. One of the quinoxaline ligands has a disordered ethyl group.

Keywords: crystal structure; extended network; quinoxaline; silver.

Figure 1

A view of the title compound (Farrugia, 2012 ▸). Displacement ellipsoids are drawn at the 50% probability level.