Solid State Communications 150 (2010) 2005–2010 Contents lists available at ScienceDirect Solid State Communications journal homepage: www.elsevier.com/locate/ssc Magneto-structural studies of the bis (1,4-bis (3-aminopropylamine) piperazinium) chloride pentachlorocuprate (II) trihydrate I. Baccar a , F. Issaoui b , F. Zouari a , M. Hussein c , E. Dhahri b,* , M.A. Valente d a Laboratoire des Sciences des Matériaux et d’Environnement, Faculté des Sciences de Sfax, 3000 Sfax, Tunisia b Laboratoire de Physique Appliquée, Faculté des Sciences de Sfax, Sfax 3000, Tunisia c Physics Department, Faculty of Science, Zagazig University, Zagazig, Egypt d I3N and Physics Department, University of Aveiro, 3810-193 Aveiro, Portugal article info Article history: Received 24 June 2010 Received in revised form 2 August 2010 Accepted 17 August 2010 by C. Lacroix Available online 8 September 2010 Keywords: C. Crystal structure D. Magnetic properties E. Differential scanning calorimetric E. Raman spectroscopy abstract Bis (1,4-bis (3-aminopropylamine) piperazinium) chloride pentachlorocuprate (II) trihydrate (C 10 H 26 N 4 ) 2 Cl CuCl 5 .3H 2 O has been prepared and characterized by various physicochemical techniques including Raman spectroscopy and magnetic properties. A preliminary single crystal X-ray diffraction structural analysis reveals that the title compound belongs to the orthorhombic system with space group Pnma. The unit cell dimensions are: a = 8.216(9), b = 13.006(8), c = 21.376(20) Å, with Z = 4. Its crystal structure was determined and refined down to R = 0.028. The structure of this compound consists of diprotonated (1,4 bis (3-aminopropyl) piperazinium) cations, polynuclear anions and water molecules. These entities are interconnected by means of hydrogen bonding contacts [N–H. . . O(Cl), O(W)–H. . . Cl and O(W)–H. . . O] forming a three-dimensional network. Differential scanning calorimetry study was carried out. The Raman of polycristalline samples, have been recorded at different temperatures between 263 and 300 K. A low temperature phase transition at 283 K of order–disorder type was found. The temperature dependence of the magnetic susceptibility was measured in the temperature range of 2–120 K at different magnetic field intensities. The experimental effective magnetic moment coincides with theoretical one. The results indicate that the complex exhibit weak antiferromagnetic coupling between the copper (II) centers. The ferromagnetic ordering is further confirmed by the presence of hysteresis loops with rapid saturation in the (C 10 H 26 N 4 ) 2 Cl CuCl 5 .3H 2 O compounds. © 2010 Elsevier Ltd. All rights reserved. 1. Introduction Halide transition-metal complexes represent a growing class of compounds whose chemistry is currently a topic of intense research.These types of materials are used in microwave devices [1,2] due to their high resistivity, high permittivity and low losses. The hybrid organoammonium halometallate (II) have played a significant role in the development of the understanding of low dimensional magnetic systems and, more recently, of semiconducting materials [3]. With M = Mn 2+ , the systems behave as classical two dimensional antiferromagnets [4], while with M = Cr 2+ and Cu 2+ , the spins in the layers order ferromagnetically [5]. The magnetic susceptibility is an important tool for the magnetic characterization of the materials. One of the best studied groups, both in solution and the solid state, are the halocuprate complexes [6,7]. The large structural * Corresponding author. Tel.: +216 98373734; fax: +216 74274437. E-mail address: essebti@yahoo.com (E. Dhahri). variability of Cu (II) due to the presence of an active Jahn–Teller effect in the d 9 electronic system and the relative flatness of the potential surfaces make the thermochromism in chlorocuprates of continual interest. These compounds and their properties are of interest not only in inorganic chemistry but also in fields ranging from solid-state physics to bioinorganic chemistry. Among solid-state physicists and chemists, there is a great interest in the copper (II) halides owing to the plasticity of the metal coordination sphere which leads to a great variety of crystalline architectures with different coordination numbers, geometries and nuclearties, and makes copper systems excellent candidates for analysing correlations between structural parameters and magnetic properties [8,9]. In this paper, we report the preparation, crystal structure and solid-state properties of the compound bis (1,4-bis (3- aminopropylamine) piperazinium) chloride pentachlorocuprate (II) trihydrate. The choice of 1,4-bis (3-aminopropylamine) piper- azine base was determined by the presence of two amino groups capable of etablishing strong hydrogen bonds, which involve the chlorine and water oxygen atoms as acceptors and stabilize the 0038-1098/$ – see front matter © 2010 Elsevier Ltd. All rights reserved. doi:10.1016/j.ssc.2010.08.018