title: catena-Poly[[[[N'-(4-cyano-benzyl-idene)nicotinohydrazide]silver(I)]-μ-[N'-4-cyano-benzyl-idene)nicotinohydrazide]] hexa-fluoridoarsenate].
abstract: In the title compound, {[Ag(C(14)H(10)N(4)O)(2)]AsF(6)}(n), the Ag(I) ion is coordinated by two N atoms from two different pyridyl rings and one N atom from one carbonitrile group of three different N'-(4-cyano-benzyl-idene)nicotinohydrazide ligands in a distorted T-shaped geometry. The Ag-N(carbonitrile) bond distance is significant longer than those of Ag-N(pyrid-yl). The bond angles around the Ag(I) atom are also not in line with those in an ideal T-shaped geometry. One type of ligand acts as the bridge that connects Ag(I) atoms into chains along [01]. These chains are linked to each other via N-H⋯O hydrogen bonds and Ag⋯O inter-actions with an Ag⋯O separation of 2.869 (2) Å. In addition, the [AsF(6)](-) counter-anions are linked to the hydrazone groups through N-H⋯F hydrogen bonds. Four of the F atoms of the [AsF(6)](-) anion are disordered over two sets of sites with occupancies of 0.732 (9) and 0.268 (9).
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou 450002, People's Republic of China.
authors.forename: Cao-Yuan
authors.initials: CY
authors.lastname: Niu
authors.forename: Ai-Min
authors.initials: AM
authors.lastname: Ning
authors.forename: Chun-Hong
authors.initials: CH
authors.lastname: Kou
authors.forename: Yong
authors.initials: Y
authors.lastname: He
authors.forename: Zhi-Qiang
authors.initials: ZQ
authors.lastname: Fen