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Improved Synthesis and Structure of 3-Carboxy-2-pyrazinecarbohydroxamic Acid
Authors:ZHOU Wei    YU Xiao-Niu    GAO Yan-Ru    CAI Hu
Affiliation:Department of Chemistry, Nanchang University, Nanchang 330031, China
Abstract:3-Carboxy-2-pyrazinehydroxamic acid was prepared by a one pot reaction starting from pyrazine-2,3-dicarboxylic anhydride with a high yield, and characterized by IR, Mass spectrum, 1H NMR and 13C NMR spectra and single-crystal X-ray diffraction. It crystallizes in triclinic, space group Pī with a=4.8659(10), b=7.4233(15), c=11.602(2), α=96.904(2), β=92.422(3), γ=107.454(2)°, V=395.51(14)3 , Z=2, Dc=1.689g/cm3 , F(000)=208, μ(MoKα)=0.149 mm-1 , the final R=0.0473 and wR=0.1306 for 2853 observed reflections (I>2σ (I)). A three-dimensional framework was assembled through intermolecular hydrogen bonding between water and 3-carboxy-2-pyrazine-carbohydroxamic acid molecules.
Keywords:3-carboxy-2-pyrazinecarbohydroxamic acid  pyrazine-2,3-dicarboxylic anhydride  crystal structure
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