Bis[5-(2-pyridyl)pyrazine-2-carbonitrile]silver(I) tetrafluoridoborate

Abstract

In the title mononuclear complex, [Ag(C10H6N4)2]BF4, the AgI atom adopts a square-planar N4 coordination geometry and is surrounded by two 5-(2-pyridyl)pyrazine-2-carbonitrile ligands. The tetrafluoridoborate anions link the mononuclear cations through intermolecular C—H...F hydrogen-bonding interactions, forming an infinite tape structure along [110]. Other weak interactions occur: π–π stacking with centroid–centroid distances of 3.820 (2) and 3.898 (1) Å between pyridyl rings and 3.610 (2) and 3.926 (2) Å between pyrazinyl rings as well as F...π contacts involving the tetrafluoridoborate anions and pyrazine rings [F...centroid = 2.999 (3) Å]; these combine with the hydrogen-bonding interactions to link the mononuclear cations into a three-dimensional supramolecular architecture.