Syntheses And Crystal Structures Of Two 3d Zinc(Ii) Compounds Involving Coordination And Hydrogen Bonds

Two zinc(II) compounds, [Zn(L)(H2O)(2)]n 1 and [Zn(4,4'-bpy)(H2O)(4)] (L) 2 (H2L trans,trans-1,3 butadiene 1,4-dicarboxylic acid), were synthesized by hydrothermal methods and characterized by single-crystal X-ray diffraction analyses. Compound I crystallizes in monoclinic, space group C2/c with a = 15.4970(16), b = 5.4976(6), c = 10.7113(12) angstrom, beta = 96.298(6)degrees, C6H8O6Zn, M-r = 241.50, V = 907.06(17) angstrom(3), Z = 4, D-c = 1.768 g/cm(3), F(000) = 488, mu = 2.703 mm(-1), S = 1.060, the final R = 0.0256 and wR = 0.0660 for 968 observed reflections with l > 2 sigma(I). Compound 2 crystallizes in triclinic, space group P (1) over bar with a = 6.915(2), b = 7.166(2), c = 10.363(3) angstrom, alpha = 73.250(4), beta = 84.429(4), gamma = 61.605(3)degrees, C16H20N2O8Zn, M-r = 433.70, V = 432.1(2) angstrom(3), Z = 1, D-c = 1.667 g/cm(3), F(000) = 224 and mu = 1.471 mm(-1), S = 1.118, the final R = 0.0486 and wR = 0.1077 for 1352 observed reflections with I > 2 sigma(I). Upon using the assembly strategy of combination of coordination polymer chains with intermolecular hydrogen bonds, three-dimensional frameworks of complexes 1 and 2 were formed.