J. Phys. IV France
Volume 114, April 2004
Page(s) 625 - 626

J. Phys. IV France
114 (2004) 625
DOI: 10.1051/jp4:2004114148

A two-dimensional magnetic architecture with bridging polynitrile and 2,2 $\prime $-bipyrimidine ligands

J.-R. Galán-Mascarós1, F. Thétiot2, S. Triki2, J. Sala Pala2 and K.R. Dunbar3

1  Instituto de Ciencia Molecular, Universidad de Valencia, Dr. Moliner 50, 46100 Burjasot, Spain
2  UMR CNRS 6521, Laboratoire de Chimie, Électrochimie Moléculaires et Chimie Analytique, Université de Bretagne Occidentale, BP. 809, 29285 Brest Cedex, France
3  Department of Chemistry, Texas A&M University, College Station, TX 77842-3012, USA

A new polymeric, two-dimensional compound [ Co 2(bpym)(dcne) 4(H 2O) 2] (1) (dcne - = [ (CN) 2CC(O)OEt)] - = 2,2-dicyano-1-ethoxyethenolate anion and bpym = 2,2' bipyrimidine) has been synthesized and characterized by X-ray crystallography. The structure is monoclinic space group P2 1/ a and consists of two-dimensional networks of octahedrally co-ordinated Co(II) ions, bridged by bis-bidentate 2,2'-bipyrimidine and $\mu _{2}$-dcne anions. Magnetic measurements revealed a broad maximum in the $\chi $ m vs T plot at 20 K which is characteristic of antiferromagnetic exchange between the high spin cobalt(II) centres. Key words. Cobalt complexes, magnetic measurements, 2.2'-bipyrimidine.

© EDP Sciences 2004