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First example of cocrystals of polymorphic maleic hydrazide

机译:多晶马来酰肼共晶的第一个例子

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The first cocrystals of polymorphic maleic hydrazide with 3-methyluracil have been studied by X-ray diffraction methods. They crystallize in the orthorhombic system, space group Pmcn, a = 6.440 ( 1) Angstrom, b = 6.974 ( 1) Angstrom, c = 22.829 ( 11) Angstrom, V = 1025.3 ( 5) Angstrom(3), Z = 4. The asymmetric unit contains one molecule of each compound. Planar ribbons of the ( 1: 1) molecular complex are obtained through the formation of O-H...O and O-H...N intermolecular hydrogen bonds, just forming a well-known R-2(2)(8) supramolecular synthon. Supramolecular assemblies are then formed by weak C-H...O and C-H...N hydrogen bonds through adjacent antiparallel ribbons.
机译:通过X射线衍射方法研究了多晶型马来酰肼与3-甲基尿嘧啶的第一共晶体。它们在正交晶系空间群Pmcn中结晶,a = 6.440(1)埃,b = 6.974(1)埃,c = 22.829(11)埃,V = 1025.3(5)埃(3),Z = 4。不对称单元的每个化合物包含一个分子。通过形成O-H ... O和O-H ... N分子间氢键获得(1:1)分子复合物的平面带,只是形成了众所周知的R-2(2)(8)超分子合成子。然后由弱的C-H ... O和C-H ... N氢键通过相邻的反平行带形成超分子组装体。

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