Research Article: Bis(9-amino­acridinium) bis­(pyridine-2,6-dicarboxyl­ato)zincate(II) trihydrate

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): M. Mirzaei, H. Eshtiagh-Hosseini, E. Eydizadeh, Z. Yousefi, K. Molčanov.


In the title compound, (C13H11N2)2[Zn(C7H3NO4)2]·3H2O, the ZnII ion is six-coordinated with the N4O2 donor set being a distorted octa­hedron through two almost perpendicular (r.m.s. deviation of ligand atoms from the mean plane is 0.057 Å) tridentate pyridine-2,6-dicarboxyl­ate ligands [dihedral angle between the ligands = 86.06 (4)°]. The charge is compensated by two 9-amino­acridinium cations protonated on the ring N atom. A variety of inter­molecular contacts, such as ion–ion, N—H⋯O and O—H⋯O hydrogen bonds, and π–π stacking [centroid–centroid distances = 3.4907 (9)–4.1128 (8) Å], between cations and between anions, play important roles in the formation of the three-dimensional network.

Partial Text

For the behaviour of 9-amino­acridine in coordination compounds see: Derikvand et al. (2010 ▶); Eshtiagh-Hosseini, Mirzaei, Eydizadeh et al. (2011 ▶). For a brief review of the pyridine­dicarboxyl­ate family of ligands, see: Mirzaei et al. (2011 ▶). For related structures, see: Aghabozorg et al. (2008 ▶); Derikvand et al. (2010 ▶); Eshtiagh-Hosseini, Yousefi, Mirzaei et al. (2010 ▶); Eshtiagh-Hosseini, Mirzaei, Eydizadeh et al. (2011 ▶); Eshtiagh-Hosseini, Mirzaei, Yousefi et al. (2011 ▶); Eshtiagh-Hosseini, Yousefi, Shafiee et al. (2010 ▶); Harrison et al. (2006 ▶); MacDonald et al. (2000 ▶); Park et al. (2007 ▶); Tabatabaee et al. (2009 ▶).