catena-PolyN′-(4-cyano­benzyl­idene)nicotinohydrazide)silver(I)-μ-N′-(4-cyano­benzyl­idene)nicotinohydrazide hexa­fluorido­phosphate

摘要

In the title polymer, {[Ag(C14H10N4O)2]PF6}n, each Ag^I ion is coordinated by two N atoms from two pyridyl rings of independent N′-(4-cyano­benzyl­idene)nicotinohydrazide ligands, and one N atom from one carbonitrile group of a symmetry-related ligand in a distorted T-shaped geometry. The ligands exhibit two modes of coordination. One acts as a bridge connecting Ag atoms to form one-dimensional chains along [01]. The other acts as a terminal monodentate ligand, coordinating to Ag through its pyridyl N atom. Two neighbouring anti­parallel chains in the crystal are connected through N—H⋯O hydrogen bonds. Other adjacent chains are packed via Ag⋯O inter­actions, with Ag⋯O separations of 2.876 (2) Å. In addition, PF6 ⁻ counter-anions inter­act with the hydrazone groups through N—H⋯F hydrogen bonds. The PF6 ⁻ anion is disordered over two sites, with occupancies of 0.773 (8) and 0.227 (8).