(Nitrato-κ O)bis­[5-(pyridin-2-yl)pyrazine-2-carbonitrile-κ ² N ⁴, N ⁵]silver(I)

Abstract

In the mononuclear title complex, [Ag(NO ₃)(C ₁₀H ₆N ₄) ₂], two κ ² N: N′-chelating 5-(pyridin-2-yl)pyrazine-2-carbonitrile ligands surround the Ag ^I atom, forming an N ₄O square-pyramidal coordination geometry with one nitrate anion bonding at the apical site. The two heterocyclic rings of the 5-(2-pyridin-2-­yl)pyrazine-2-carbonitrile ligand are almost coplanar [dihedral angle = 5.63 (8)°], and the two chelating ligands are in an anti relationship. The mononuclear units are inter­connected along [010] through C—H⋯O(nitrate) and C—H⋯N(cyano) inter­actions, forming an infinite chain. The mononuclear units are stacked along the a axis and inter­connected via inter­molecular π–π stacking inter­actions between adjacent pyridine and pyrazine rings [centroid–centroid distances = 3.984 (2) and 3.595 (3) Å], thus forming a three-dimensional supra­molecular structure.