A Hydrogen-bonded Tubular Structure of Zinc(Ⅱ) and Methyl-3-pyridylcarbamate

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A zinc(Ⅱ) compound [ZnCl2(mpcm)2](1,mpcm = methyl-3-pyridylcarbamate) was prepared by solvothermal reaction and characterized by elemental analysis,IR spectroscopy,TGA and single-crystal X-ray diffraction.The crystal is of monoclinic system,space group P21/n,C14H16ZnCl2N4O4,Mr = 440.58,a = 8.7893(7),b = 24.978(2),c = 9.2510(8),β = 109.318(1)°,V = 1916.6(3)3,Z = 4,θ = 1.63~25.20°,Dc = 1.527 g/cm3,μ = 1.585 mm-1,F(000) = 896,the final R = 0.0255 and wR = 0.0654 for 3080 observed reflections with Ⅰ > 2σ(Ⅰ).The zinc atom is four-coordinated by the pyridyl groups of two mpcm ligands and two chloride ions with a tetrahedral geometry.Two [ZnCl2(mpcm)2] subunits are held together by a pair of hydrogen bonds,forming a 32-membered macrocyclic dimer,which is further extended into a 3D tubular structure via hydrogen bonding. A zinc (Ⅱ) compound [ZnCl2 (mpcm) 2] (1, mpcm = methyl-3-pyridylcarbamate) was prepared by solvothermal reaction and characterized by elemental analysis, IR spectroscopy, TGA and single-crystal X-ray diffraction. is of the monoclinic system, space group P21 / n, C14H16ZnCl2N4O4, Mr = 440.58, a = 8.7893 (7), b = 24.978 (2), c = 9.2510 (8) D = 1.527 g / cm3, μ = 1.585 mm-1, F (000) = 896, the final R = 0.0255 and wR = 0.0654 for 3080 (3)  3, Z = 4, θ = 1.63-25.20 ° reflections with Ⅰ> 2σ (Ⅰ). The zinc atom is four-coordinated by the pyridyl groups of two mpcm ligands and two chloride ions with a tetrahedral geometry. Two [ZnCl 2 (mpcm) 2] subunits are held together by a pair of hydrogen bonds, forming a 32-membered macrocyclic dimer, which is further extended into a 3D tubular structure via hydrogen bonding.
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