Syntheses and Crystal Structures of Two 1D Chain Coordination Polymers Based on 2-Benzoylbenzoic Acid

Two new coordination polymers, [Co(BYBA)2(4,4'-bpy)(H2O)2]·H2O (1) and [Zn(BYBA)2(4,4'-bpy)] (2) (4,4'-bpy = 4,4'-bipyridine, BYBAH = 2-benzoylbenzoic acid), have been synthesized by hydrothermal conditions and characterized by single-crystal X-ray diffraction,elemental analyses, IR spectra and fluorescence spectrum. Crystal data for 1: C38H32CoN2O9, Mr=719.59, monoclinic, space group P2/c, a = 22.981(2), b = 11.4438(11), c = 12.9327(12) (A), β =94.642(1)°, V= 3390.0(5) (A)3, Z = 4, Dc= 1.410 g/cm3, F(000) = 1492, R = 0.0488 and wR = 0.1201;and those for 2: C38H26ZnN2O6, Mr = 672.00, triclinic, space group P-1, a = 8.7032(10), b =11.4882(13), c = 16.872(2) (A), α = 107.146(1), β = 99.055(1), γ = 90-851(2)°, V= 1588.5(3) (A)3, Z=2, Dc = 1.405 g/cm3, F(000) = 692, R= 0.0409 and wR = 0.0894. Complex 1 exhibits 1D polymeric chains which are linked into a 2D sheet by π…π interactions. Complex 2 is composed by 1D zigzag chains connected through C-H…π stacking interactions to generate a 2D layer.