Structure and Magnetic Properties of a Bipyridine-bridged One-dimensional Ni(II) Coordination Polymer

A polymer, [NiL(bipy)center dot 2H(2)O](n) (1, bipy = 4,4'-bipyridine), has been acquired by the reaction of Ni(OAc)(2)center dot 4H(2)PO with N,N'-bis(2-hydroxyl-5-fluorobenzyl)-2-hydrxylpropane dii-mine in the presence of 4,4'-bipyridine. X-ray crystallographic analysis shows that it is comprised of a mononuclear Ni(II) complex [NiL] linked by 4,4'-bipyridine. Its crystal crystallizes in the orthorhombic system, space group C2/c with a = 22.595(3), b = 18.395(2), c = 15.434(2) angstrom, V = 6155(1) angstrom(3), D-c = 1.259 g/cm(-3), Z = 8, M-r = 583.23, F(000) = 2416.0, mu(MoKa) = 0.681 mm(-1), S = 1.049, R = 0.0512 and wR = 0.1108 for 6032 observed reflections (I > 2 sigma(I)). There are water hexamers in the complex. A weak overall ferromagnetic behavior has been evaluated by Curie-Weiss rule and by the formula of alternating ferro-ferromagnetic coupling in one-dimensional Ni(II) chain, which gives g = 2.005(1) and J(1) = 0.31(3) cm(-1).