Coordination polymers of cobalt(II): [Co(4,4 '-bpy)(2)(O2CCF3)(2)](n) and [Co(4,4 '-bpy)(O2CCH3)(2)(H2O)(2)](n)

Two novel coordination polymers of cobalt(II) have been synthesized and cha racterized structurally. The first compound, [Co(4,4'-bpy)(2)(O2CCF3)(2)] ( 1), was obtained from the reaction of Co(O2CCF3)(2) with 4,4'-bipyridine. C ompound 1 has a covalently linked, two-dimensional, fishing-net-like struct ure. The fishing nets of 1 stack in the lattice, allowing the formation of extended channels that host diethyl ether solvent molecules in the solid st ate. The second compound, [Co(4,4'-bpy)(O2CCH3)(2)(H2O)(2)] (2), was obtain ed from the reaction of Co(CH3CO2)(2). 4H(2)O with 4,4'-bipyridine. Compoun d 2 has a covalently linked one-dimensional chain structure. In the crystal lattice of 2 the one-dimensional chains form an interpenetrating, three-di mensional structure aia interchain hydrogen bonds between acetate and H2O l igands. There are channels parallel to the b axis in the lattice of 2 that appear to host small guest molecules such as methanol and H2O.