首页> 美国卫生研究院文献>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures of two 1:2 dihydrate compounds of chloranilic acid with 2-carb­oxy­pyridine and 2-carb­oxy­quinoline
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Crystal structures of two 1:2 dihydrate compounds of chloranilic acid with 2-carb­oxy­pyridine and 2-carb­oxy­quinoline

机译:两种氯苯甲酸1:2二水合物与2-咔­氧基吡啶和2-咔­氧基喹啉的晶体结构

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摘要

The crystal structure of the 1:2 dihydrate compound of chloranilic acid (systematic name: 2,5-di­chloro-3,6-dihy­droxy-1,4-benzo­quinone) with 2-carb­oxy­pyridine (another common name: picolinic acid; systematic name: pyridine-2-carb­oxy­lic acid), namely, 2C6H5.5NO2 0.5+·C6HCl2O4 ·2H2O, (I), has been determined at 180 K, and the structure of the 1:2 dihydrate compound of chloranilic acid with 2-carb­oxy­quinoline (another common name: quinaldic acid; systematic name: quinoline-2-carb­oxy­lic acid), namely, 2C10H7NO2·C6H2Cl2O4·2H2O, (II), has been redetermined at 200 K. This determination presents a higher precision crystal structure than the previously published structure [Marfo-Owusu & Thompson (2014). X-ray Struct. Anal. Online, >30, 55–56]. Compound (I) was analysed as a disordered structure over two states, viz. salt and co-crystal. The salt is bis­(2-carb­oxy­pyridinium) chloranilate dihydrate, 2C6H6NO2 +·C6Cl2O4 2−·2H2O, and the co-crystal is bis­(pyridinium-2-carboxyl­ate) chloranilic acid dihydrate, 2C6H5NO2·C6H2Cl2O4·2H2O, including zwitterionic 2-carb­oxy­pyridine. In both salt and co-crystal, the water mol­ecule links the chloranilic acid and 2-carb­oxy­pyridine mol­ecules through O—H⋯O and N—H⋯O hydrogen bonds. The 2-carb­oxy­pyridine mol­ecules are connected into a head-to-head inversion dimer by a short O—H⋯O hydrogen bond, in which the H atom is disordered over two positions. Compound (II) is a 1:2 dihydrate co-crystal of chloranilic acid and zwitterionic 2-carb­oxy­quinoline. The water mol­ecule links the chloranilic acid and 2-carb­oxy­quinoline mol­ecules through O—H⋯O hydrogen bonds. The 2-carb­oxy­quinoline mol­ecules are connected into a head-to-tail inversion dimer by a pair of N—H⋯O hydrogen bonds.
机译:氯苯甲酸的1:2二水合物(系统名称:2,5-二氯-3,6-二羟基-1,4-苯醌)与2-羧基吡啶(另一个通用名称:吡啶甲酸;系统名称:)的晶体结构吡啶-2-羧酸)(即2C6H5.5NO2 0.5 + ·C6HCl2O4 -·2H2O,(I))的测定温度为180 ofK,氯苯甲酸与2-羧基喹啉的1:2二水合物(另一个通用名称:喹啉酸;系统名称:喹啉-2-羧酸),即2C10H7NO2·C6H2Cl2O4·2H2O,(II),已于200°K重新测定与以前发表的结构相比,该测定结果显示出更高的晶体结构[Marfo-Owusu&Thompson(2014)。 X射线结构。肛门在线,> 30 ,55-56]。化合物(I)被分析为两种状态的无序结构,即。盐和共结晶。该盐是双(2-羧基吡啶鎓)氯苯甲酸二水合物,2C6H 6 NO 2 + ·C 6 Cl < sub> 2 O 4 2-−sup>·2H 2 O,共晶体为双(吡啶-2-羧酸吡啶盐) )二水合氯苯甲酸2C 6 H 5 NO 2 ·C 6 H 2 Cl 2 O 4 ·2H 2 O,包括两性离子2-羧基吡啶。在盐和共晶体中,水分子都通过O-H = O和N-H = O氢键将氯胺酸和2-羰氧基氧吡啶吡啶分子连接起来。通过一个短的OHH = O氢键,将2-羰基氧基吡啶吡啶分子连接到一个头对头的反相二聚体中,其中的H原子在两个位置上都是无序的。化合物(II)是氯苯甲酸和两性离子2-碳­氧基­喹啉的1:2二水合物共晶体。水分子通过OH-H = O氢键将氯苯甲酸和2-羰基氧基喹啉分子连接起来。 2-碳氧氧基喹啉分子通过一对N-H = O氢键连接成头对尾的反转二聚体。

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