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

Magnetic chains formed from tetra-coordinate Co(II) complexes

Monika Idešicová, Alžbeta Krutošíková, Viera Mrázová, and Roman Boča

Department of Chemistry, Faculty of Natural Sciences, University of Ss. Cyril and Methodius, J. Herdu 2, 917 01, Trnava, Slovakia

E-mail: roman.boca@stuba.sk

Abstract: Two tetra-coordinate Co(II) complexes, [CoCl₂(bzfupy)₂] and [CoCl₂(p-tol)₂] with N-donor ligands, are apparently mononuclear systems. The magnetic susceptibility at low temperature attains a maximum which is a fingerprint of the exchange interaction. The exchange coupling constant fitted to a model of 1D-magnetic chain yields J/hc = −0.50 cm⁻¹ and −0.57 cm⁻¹, respectively. The magnetic interaction is mediated by the π-π stacking in the first complex, and the short Cl…Cl contacts in the second.

Keywords: cobalt(II) complexes – magnetic chain – exchange coupling

Full paper is available at www.springerlink.com.

DOI: 10.2478/s11696-012-0187-6

Chemical Papers 67 (3) 300–304 (2013)