Syntheses and Crystal Structures of Two One-dimensional Coordination Polymers Constructed from a Flexible Hinge-like Ligand

By using the flexible hinge-like ligand 2,2'-bis(3-hydroxy-1,4-naphthoquinone) (H(2)bhnq), two isomorphous one-dimensional zigzag chain coordination polymers have been obtained. Single-crystal X-ray analyses revealed that the metal centers in these two complexes are distorted octahedra involving four oxygen atoms of two bhnq(2-) anions, and two oxygen atoms of two DMF molecules situated in trans positions to one another. Crystal data for [Mn(bhnq)(DMF)(2)](n) 1: C26H22MnN2O8, M-r = 545.40, monoclinic, space group C2/c, a = 14.936(3), b = 10.362(2), c = 15.901(3) angstrom, beta = 99.86(3)degrees, V = 2424.7(8) angstrom(3), Z = 4, D-c = 1.494 g/cm(3), F(000) = 1124, mu = 0.599 mm(-1), final GOOF = 1.025, R = 0.0654 and wR = 0.1537. Crystal data for [Cd(bhnq)(DMF)(2)](n) 2: C26H22CdN2O8, M-r = 602.86, monoclinic, space group C2/c, a = 14.839(3), b = 10.493(2), c = 16.034(3) angstrom, beta = 99.40(3)degrees, V = 2463.1 (9) angstrom(3), Z = 4, D-c = 1.626 g/cm(3), F(000) = 1216, mu = 0.941 mm final GOOF = 1.069, R = 0.0358 and wR = 0.0944.