Molecular Cocrystals of Carboxylic Acids. XXV The Utility of Urea in Structure Making with Carboxylic Acids and the Crystal Structures of a Set of Six Adducts with Aromatic Acids
Molecular Cocrystals of Carboxylic Acids. XXV The Utility of Urea in Structure Making with Carboxylic Acids and the Crystal Structures of a Set of Six Adducts with Aromatic Acids
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羧酸分子共晶体。
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
C. Kennard
中科院分区：
文献类型：
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作者：
Graham Smith;Katherine E. Baldry;K. Byriel;C. Kennard
合成了尿素与六种芳香族羧酸的分子加合物，并用X-射线衍射法和红外光谱对其进行了表征。这些化合物分别为5-硝基水杨酸[(C7H5NO5)2(CH4N2O)](1)，3，5-二硝基水杨酸[(C7H4N2O7)(CH4N2O)](2)，4-氨基苯甲酸[(C7H7NO2)2(CH4N2O)](3)，邻苯二甲酸[(C8H6O4)(CH4N2O)](4)，吡嗪-2，3-二元酸[(C4H4N2O4)(CH4N2O)](5)和吡啶-2，6-二元酸[(C7H5NO4)(CH4N2O)2](6)。在大多数加合物中，尿素分子上的所有六个潜在相互作用部位都被用于氢键，从而获得聚合物结构。
Molecular adducts of urea with six aromatic carboxylic acids have been prepared and characterized by using X-ray diffraction methods and infrared spectroscopy. These compounds are with 5-nitrosalicylic acid [(C7H5NO5)2(CH4N2O)] (1), 3,5-dinitrosalicylic acid [(C7H4N2O7)(CH4N2O)] (2), 4-aminobenzoic acid [(C7H7NO2)2(CH4N2O)] (3), o-phthalic acid [(C8H6O4)(CH4N2O)] (4), pyrazine-2,3-dicarboxylic acid [(C4H4N2O4)(CH4N2O)] (5) and pyridine-2,6-dicarboxylic acid [(C7H5NO4)(CH4N2O)2] (6). In the majority of the adducts, all six potential interactive sites on the urea molecules are utilized in hydrogen bonding, giving polymeric structures.