Acta Cryst. (2008). E64, m1618-m1619  [ doi:10.1107/S1600536808038907 ]

catena-Poly[[[N'-(4-cyanobenzylidene)nicotinohydrazide)silver(I)]--N'-(4-cyanobenzylidene)nicotinohydrazide] hexafluoridophosphate]

X.-S. Wan, Y.-L. Dang, C.-H. Kou, Z.-F. Zhou and C.-Y. Niu

Abstract: 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-HO hydrogen bonds. Other adjacent chains are packed via AgO interactions, with AgO separations of 2.876 (2) Å. In addition, PF₆^- counter-anions interact with the hydrazone groups through N-HF hydrogen bonds. The PF₆^- anion is disordered over two sites, with occupancies of 0.773 (8) and 0.227 (8).

Online 26 November 2008

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