Date Published: July 01, 2012
Publisher: International Union of Crystallography
Author(s): Yuan-Zheng Cheng, Wei-Wei Shi, Xue-Dong Wang, Shu-E Deng, Li-Ping Zhang.
In the title compound, [Pb2(C7H4O6S)2(C12H8N2)2(H2O)2]·CH3COOH, the seven-coordinate PbII atom is chelated by two N atoms of one 1,10-phenanthroline ligand, four O atoms from three 5-sulfosalicylate dianions and one water O atom. Each dianion serves as a bridging ligand, connecting adjacent PbII atoms into a centrosymmetric polymeric chain extending parallel to . There are π–π interactions between the aromatic systems of neighbouring dianions, with plane-to-plane distances of 3.371 (2) Å, and between phenanthroline ligands, with a centroid-to-centroid distance of 3.484 (2) Å. O—H⋯O hydrogen bonding additionally stabilizes the crystal packing. The acetic acid molecules are incorporated in the voids of this arrangement. They exhibit half-occupancy due to disorder around a centre of inversion.
For background to 5-sulfosalicylic acid and its metal complexes, see: Chen et al. (2003 ▶); Du et al. (2006 ▶); Fan & Zhu (2005a ▶,b ▶, 2006 ▶); Li et al. (2004 ▶).