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'-b ipy) 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 analy sis, IR spectra and thermal analysis. Its X-ray crystal structure dete rmination reveals that the local coordination geometry around the Mn-I I 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 bond s to coordinated water molecules. The determination of variable-temper ature magnetic susceptibilities (74-300 K) shows that the magnetic beh aviour obeys the Curie law. There is practically no evidence of any ma gnetic exchange interaction between the adjacent metal ions.