title: A stair-like two-dimensional silver(I) coordination polymer of N'-(3-cyanobenzylidene)nicotinohydrazide.
abstract: The structure of the title compound, poly[[[mu3-N'-(3-cyanobenzylidene)nicotinohydrazide]silver(I)] hexafluoroarsenate], {[Ag(C14H10N4O)](AsF6)}n, at 173 K exhibits a novel stair-like two-dimensional layer and a three-dimensional supramolecular framework through C-H...Ag hydrogen bonds. The Ag(I) cation is coordinated by three N atoms and one O atom from N'-(3-cyanobenzylidene)nicotinohydrazide (L) ligands, resulting in a distorted tetrahedral coordination geometry. The organic ligand acts as a mu3-bridging ligand through the pyridyl and carbonitrile N atoms and deviates from planarity in order to adapt to the coordination geometry. Two ligands bridge two Ag(I) cations to construct a small 2+2 Ag2L2 ring. Four ligands bridge one Ag(I) cation from each of four of these small rings to form a large grid. An interesting stair-like two-dimensional (3,6)-net is formed through Ag(I) metal centres acting as three-connection nodes and through L molecules as tri-linkage spacers.
authors.affiliation: College of Sciences, Henan Agricultural University, Zhengzhou 450002, People's Republic of China. niu_cy2000@yahoo.com.cn
authors.forename: Cao-Yuan
authors.initials: CY
authors.lastname: Niu
authors.forename: Ai-Min
authors.initials: AM
authors.lastname: Ning
authors.forename: Lei
authors.initials: L
authors.lastname: Meng
authors.forename: Chun-Hong
authors.initials: CH
authors.lastname: Kou
authors.forename: Yong
authors.initials: Y
authors.lastname: He