Crystal structure of a helical silver(I) coordination polymer based on an unsymmetrical dipyridyl ligand:catena-poly[[silver(I)-μ-N-(pyridin-4-ylmethyl)pyridine-3-amine-κ2N:N′] tetrafluoridoborate methanol hemisolvate]

Abstract

The asymmetric unit of the title compound, {[AgL]·BF4·0.5CH3OH}n,L=N-(pyridin-4-ylmethyl)pyridine-3-amine, C11H11N3, contains one AgIion, one ligandL, one tetrafluoridoborate anion disordered over two orientations in a 0.669 (13):0.331 (13) ratio and one half of a methanol solvent molecule situated on an inversion center. Each AgIion is coordinated by two N atoms from twoLligands in a distorted linear geometry [N—Ag—N = 174.70 (19)°]. EachLligand bridges two AgIions, thus forming polymeric helical chains propagating in [010]. In the crystal, Ag...Ag [3.3369 (10) Å] and π–π interactions between the aromatic rings [centroid-to-centroid distance = 3.676 (4) Å] link these chains into layers parallel to (10-1). Ag...F and weak N(C)—H...F interactions further consolidate the crystal packing.