ISSN 10703284, Russian Journal of Coordination Chemistry, 2013, Vol. 39, No. 12, pp. 877–884. © Pleiades Publishing, Ltd., 2013. 877 1 The article is published in the original. INTRODUCTION The mercury(II) complexes have been studied widely as important part of coordination chemistry not only due to their structural novelty but also for their potential applications [1–5]. In recent years, many attempts have been made to prepare polymeric complexes using halides, pseudohalides and flexible Schiff base ligands and their structures have been determined [6–9]. In contrast to coordination poly mers of transition metal complexes, the coordination polymers of mercury(II) with flexible Schiff base ligands seems to be surprisingly sparse [2, 3, 5]. Flexi ble Schiff base ligands, halides and pseudohalides counter ions are capable of acting as bridging ligands and thus may form polymeric structures with Hg 2+ ion. However, isolating suitable singlecrystals of poly meric mercury(II) complexes is problematic, because these complexes are very little soluble in the common organic solvents [2–5]. Continuing with our previous work on mercury(II) complexes with Schiff base ligands [10, 11], we now present the synthesis and characterization of three new onedimensional mer cury(II) complexes, [Hg 2 (μ N,N ((Me 2 NBa) 2 Bn)(μ X) 2 X 2 ] n , where X = Cl (I), Br (II) and I (III); (Me 2 N Ba) 2 Bn = N,N'bis(dimethylamiono)ben zylidene)butane1,4diamine): N N N H 3 C CH 3 Hg Hg X N X X CH 3 CH 3 Hg X N N N H 3 C CH 3 Hg N X X CH 3 CH 3 Scheme 1. n OneDimensional Mercury(II) Coordination Polymers with a Flexible Bidentate Schiff Base Ligand (Me 2 NBa) 2 Bn: Synthesis, Characterization, and Crystal Structures 1 A. D. Khalaji a, *, B. Bahramian b , K. Jafari b , K. Fejfarova c , and M. Dusek c a Department of Chemistry, Faculty of Science, Golestan University, Iran b College of Chemistry, Shahrood University of Technology, Shahrood, Iran c Institute of Physics of the ASCR, Prague 8, 18221 Czech Republic *email: ad.khakiji@gu.ac.ir Received June 26, 2012 Abstract—Three onedimensional mercury(II) complexes, [Hg 2 (μ N,N ((Me 2 NBa) 2 Bn)(μX) 2 X 2 ] n , where X = Cl (I), Br (II), and I (III), (Me 2 NBa) 2 Bn = N,N'bis(dimethylaminobenzylidene)butane1,4diamine, involving a bidentate Schiff base with a flexible spacer (=N–C–C–C–C–N=) were prepared under mild condition and characterized by elemental analyses (CHN), FTIR, 1 H & 13 CNMR spectroscopy. The crys tal structure of II has been determined by Xray singlecrystal diffraction. Each Hg(II) center adopts a dis torted [HgNBr 3 ] tetrahedron environment arising from two crystallographically equivalent (Me 2 NBa) 2 Bn Schiff base ligands. Each of ligands acts as N 2 bischelating ligand with the nitrogen atoms of two imine func tions in antiform leading to the dinuclear [Hg 2 (μ N,N (Me 2 NBa) 2 Bn)Br 2 ] groups. Such dinuclear [Hg 2 (μ N,N ((Me 2 NvgBa) 2 Bn)Br 2 ] groups are bridged two iodine anions (μBr) 2 to form a neutral 1Dchain mercury (II) coordination polymer. DOI: 10.1134/S1070328413120051