title: catena-Poly[[[N'-(4-cyano-benzyl-idene)nicotinohydrazide)silver(I)]-μ-N'-(4-cyano-benzyl-idene)nicotinohydrazide] hexa-fluorido-phosphate].
abstract: In the title polymer, {[Ag(C(14)H(10)N(4)O)(2)]PF(6)}(n), each Ag(I) ion is coordinated by two N atoms from two pyridyl rings of independent N'-(4-cyano-benzyl-idene)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 anti-parallel chains in the crystal are connected through N-H⋯O hydrogen bonds. Other adjacent chains are packed via Ag⋯O inter-actions, with Ag⋯O separations of 2.876 (2) Å. In addition, PF(6) (-) counter-anions inter-act with the hydrazone groups through N-H⋯F hydrogen bonds. The PF(6) (-) anion is disordered over two sites, with occupancies of 0.773 (8) and 0.227 (8).
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou 450002, People's Republic of China.
authors.forename: Xin-Sheng
authors.initials: XS
authors.lastname: Wan
authors.forename: Yu-Li
authors.initials: YL
authors.lastname: Dang
authors.forename: Chun-Hong
authors.initials: CH
authors.lastname: Kou
authors.forename: Zhan-Fang
authors.initials: ZF
authors.lastname: Zhou
authors.forename: Cao-Yuan
authors.initials: CY
authors.lastname: Niu