ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Preparation, structural characterisation, and magnetic properties of [Cu(men)₂][Cu₂Cd₂Cl₂(CN)₆] (men = N-methylethane-1,2-diamine)

Juraj Kuchár and Juraj Černák

Department of Inorganic Chemistry, Pavol Jozef Šafárik University in Košice, Moyzesova 11, 041 54, Košice, Slovakia

E-mail: juraj.kuchar@upjs.sk

Abstract: The novel complex [Cu(men)₂][Cu₂Cd₂Cl₂(CN)₆] (I) was isolated from the aqueous-ethanol system containing CuCl₂, men (men = N-methylethane-1,2-diamine) and K₂[Cd(CN)₄] in the presence of dilute hydrochloric acid and chemically and spectroscopically characterised. The crystal structure of I consists of [Cu₂^I(CN)₆] and [Cd₂Cl₂(CN)₆] building units bridged by cyanide ligands and forms a three-dimensional skeleton with cavities. [Cu(men)₂]²⁺ cations in which two men ligands are chelated (mean Cu-N is 2.033(6) Å) are located in the cavities. The coordination polyhedron around the Cu(II) atoms is formed as a tetragonal bipyramidal by two weaker axial Cu-Cl bonds (2.8642(12) Å) with chlorido ligands from the skeleton. The Cu(I) and Cd(II) atoms in the skeleton exhibit tetra-(CuC₄ chromophore) and penta-coordination (CdN₃Cl₂), respectively. The temperature-dependent susceptibility measurements indicate a Curie-Weiss-like behaviour and the presence of weak anti-ferromagnetic interaction.

Keywords: copper(II) compounds – cyanide complex – N-methylethane-1,2-diamine – crystal structure – magnetic studies

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0275-7

Chemical Papers 67 (4) 408–414 (2013)