| Abstract: | The title complex has been obtained by the reaction of cobalt sulfate heptahydrate
with 4,4'-bpy and 4-abaH (4,4'-bpy = 4,4'-bipyridine, 4-abaH = 4-aminobenzonic acid) in ethanol
solution, and its structure was determined by X-ray crystallography with the following data:
tetragonal, space group P42/n, Mr = 5692.46, Co8C192H288N32O120S8, a = b = 16.402(5), c =
22.750(5) (A), Z = 1, V = 6120(2) (A)3, F(000) = 2968, Dc = 1.544 g/cm3,μ = 0.707 mm- 1, the final R
= 0.0786 and wR = 0.1935 for 2673 observed reflections (I ＞ 2σ(I)). The title complex consists of
polymeric Co(4,4'-bipy)(H2O)4]2+ cation chains, SO42- anions, lattice 4-abaH and water mole
cules. The center CoⅡ ions are connected by bridging 4,4'-bpy ligands exhibiting one-dimensional
chains, and coordinated by four water molecules into a distorted octahedral geometry. These chains
are further extended by hydrogen bonds among SO42- anions, coordinated and lattice water
molecules as well as lattice 4-abaH molecules into a three-dimensional network. |
