Catena-Poly[[[[N′-(4-cyano-benzyl-idene)nicotinohydrazide]silver(I)] - [N′-4-cyano-benzyl-idene)nicotinohydrazide]] hexa-fluoridoarsenate]

In the title compound, {[Ag(C 14H 10N 4O) 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). © 2009 Niu et al.