Crystal structure of (μ2-1,5-naphthalenedisulfonato-O,O′)-diaqua-tetrakis (2,2′-bipyridine-N,N′)-dimanganese(II) 1,5-naphthalenedisulfonate tetrahydrate, [Mn(C10H8N2)2]2(C10H6O6S2)2·4(H2O), C60H56Mn2N8O18S4

Abstract

Source of materialAm ixture of sodium naphthalene-1,5-disulfonate (NDS) (0.033 g, 0.1mmol), Mn(CH 3 COO) 2 ·4H 2 0(0.025 g, 0.1mmol), 2,2'-bipyridine (0.32 g,0.2 mmol), H 2 O(20mL) and acetonitrile (10 mL) was stirred for about 120 min. The resulting solution was left at room temperature for afew days, and yellow single crystals (about 56%, basedonMninput)wererecovered by vacuum filtration, drying in air. Experimental detailsThe C-bound Hatomswere geometrically placed (C-H =0.93 Å) and refined as riding with U iso (H) =1.2U eq (C). The O-bound Hatomsw ere geometrically placed (O-H =0 .85 Å) and refined as riding with U iso (H) =1.2U eq (O). The 1,5-naphthalenedisulfonate anion is disordered over two sites with occupancies of 1:1. Adata completeness of only 92% was achieved. DiscussionIn the past decade, much attention has been drawn to the area of design and synthesis of metal-organic coordination polymers, owing to their interesting topologies and crystal packing motifs, as well as potential applications as functional materials [1,2]. The selection of the special ligand is very important in the construction of these coordination polymers. As an important family of multidentate O-donor ligands, organic aromatic polysulfonate ligands have been extensively employed in the preparation of such metal organic complexes with multidimensional networks and interesting properties [3].1,5-naphthalenedisulfonate (NDS) is agood ligand for the construction of metal-containing supramolecular networks, and its use has beene xemplified by many transition-metal-based coordination polymers observed in the literatures [4,5]. In this paper, we describe anew dimeric complex basedonMn(II)ions, 2,2'-bipyridine ligands (bipy)and NDS ligands which is isotypical to the structure of aliterature known Cd complex [6]. Theasymmetric unit of the title structure contains one Mn(II) ion, two 2,2'-bipyridine molecules, one coordinated and two lattice water molecules, and two fragments of 1,5-naphthalenedisulfonate anions, as shown in the figure. Mn(II) is coordinated by four nitrogen atomsfrom two individual bipy ligands, one oxygen atom from a NDS ligand and one coordinated water molecule, forming an octahedral geometry. The Mn-N distances range from 2.259(2) to 2.273 (2)