Crystal structure of poly[(acetonitrile-N)(3-7-{[bis(pyridin-2-ylmethyl)amino]methyl }-8-hydroxy- quinoline-5-sulfonato-⁴N,O:O':O" )sodium]

In the title compound, [Na(C22H19N4O4S)(CH3CN)](n), the Na-I atom adopts a distorted square-pyramidal coordination geometry, formed by one N and one O atom of the qunolinol moiety in the ligand, two O atoms of sulfonate moieties of two adjacent ligands and the N atom of the coordinated acetonitrile solvent. The Na-I atom is located well above the mean basal plane of the square-based pyramid. The apical position is occupied by a sulfonate O atom of a neighboring ligand. Three N atoms of the bis(pyridin-2-ylmethyl)amine moiety in the ligand are not coordinated by the sodium atom. The molecule forms an intramolecular bifurcated O-H center dot center dot center dot[N(tertiary amine),N(pyridine)] hydrogen bond, generating S(6) and S(5) rings. In the crystal, four molecules are linked by four Na-O(sulfonato) bridged coordination bonds, forming a supramolecular centrosymmetric tetramer unit comprising an eight-membered ring, and generating a two-dimensional network sheet. The molecules of different sheets form intermolecular C-H center dot center dot center dot O hydrogen bonds, and thereby a three-dimensional network structure.