SYNTHESIS, CHARACTERIZATION AND MAGNETIC-PROPERTIES OF ONE-DIMENSIONAL 4,4'-BIPYRIDINE-BRIDGED MANGANESE(II) COMPLEX - CRYSTAL-STRUCTURE OF [MN(MU-4,4'-BIPY)(4,4'-BIPY)(NCS)(2)(H2O)(2)](N)

The one-dimensional manganese(II) complex with 4,4'-bipyridine (4,4'-bipy) as bridging ligand, of formula [Mn(mu-4,4'-bipy)(4,4'-bipy)(NCS)(2)(H2O)(2)](n), has been prepared and characterized by elemental analysis, IR spectra and thermal analysis. Its X-ray crystal structure determination reveals that the local coordination geometry around the Mn-II ion is a distorted octahedron. Mn(NCS)(2)(H2O)2 coordination planes are bridged by 4,4'-bipyridines to form an infinite chain structure. A second 4,4'-bipyridine exists in the lattice, linked by hydrogen bonds to coordinated water molecules. The determination of variable-temperature magnetic susceptibilities (74-300 K) shows that the magnetic behaviour obeys the Curie law. There is practically no evidence of any magnetic exchange interaction between the adjacent metal ions.