Date Published: July 01, 2011
Publisher: International Union of Crystallography
Author(s): Xiao Jing, Yu-Lan Zhu, Kui-Rong Ma, Li Cao, Shuai Shao.
In the title one-dimensional coordination polymer, [Ag(NO3)(C12H6N2O2)]n, the AgI atom is pentacoordinated by two N atoms from a 1,10-phenanthroline-5,6-dione (phen-dione) ligand, one O atom from the nitrate anion and two O atoms from another phen-dione ligand. The coordination environment around silver is slightly distorted square-pyramidal. Interestingly, the Ag—O distances to the phen-dione ligand are different [Ag—O = 2.612 (6) and 2.470 (5) Å]. The one-dimensional chains run parallel to  and are further interconnected by weak hydrogen bonds (C—H⋯O) and π–π stacking interactions [centroid–centroid distances 3.950 (4) and 3.792 (4) Å], forming a three-dimensional supramolecular network.
For the use of 1,10-phenanthroline-5,6-dione (phen-dione) as an efficient chelating ligand establishing coordination polymers, see: Calderazzo et al. (2002 ▶); Wu et al. (1996 ▶); Liu & Xu (2006 ▶); Li et al. (2005 ▶). For examples of complexes with N,O-coordination of phen-dione, see: Paw & Eisenberg (1997 ▶); Ruiz et al. (1999 ▶); Shavaleev et al. (2003 ▶). For the synthesis of phen-dione, see: Paw & Eisenberg (1997 ▶). For the structure of a related phen-dione complex of AgI, see: Onuegbu et al. (2009 ▶). For a comparison of Ag—O bond lengths, see: Young & Hanton (2008 ▶); Sun et al. (2010 ▶); Wang et al. (2011 ▶).