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Co-crystals of 1, 3-adamantanedicarboxylic acid with N-oxide and Aza compounds

机译:1,3-金刚烷二羧酸与N-氧化物和Aza化合物的共晶体

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Co-crystals 1a - 1d and 1d0 have been prepared by slow evaporation of the solutions of mixtures of 1, 3-adamantanedicarboxylic acid (1) and 1, 3-di(pyridin-4-yl)propane (a), E-1, 2-di(pyridine-4yl)diazene (b), (E)-2, 2′- (ethene-1, 2-diyl)dipyridine 1-oxide (c), and 1, 7-phenanthroline (d), as the case may be. The structures of the complexes are determined by the single crystal X-ray diffraction method. The structure analysis reveals that in all the complexes the basic recognition between the co-crystal formers is through O - H· · · N/C - H · · · O pairwise hydrogen bonds except in 1c. Because of the presence of N-oxide functionality, in 1c, the co-crystal formers are held together by O - H · · · O/C - H · · · O pairwise hydrogen bonds. Further, while all the structures form stacked sheets arrangement in the three-dimensional packing, within the two-dimensional arrangement contrast differences are found with a notable observation being the host network with voids in the structure of 1c. In addition, acid 1 and d form two different conformational polymorphs due to the variations in the conformations of the two - COOH groups that prevail on acid 1 but with a similar recognition pattern between the co-crystal formers.
机译:通过缓慢蒸发1,3-金刚烷二羧酸(1)和1,3-二(吡啶-4-基)丙烷(a),E-1的混合物的溶液来制备共晶1a-1d和1d0 ,2-二(吡啶-4基)二氮烯(b),(E)-2、2'-(乙烯-1、2-二基)二吡啶1-氧化物(c)和1、7-菲咯啉(d),视情况可以是。配合物的结构通过单晶X射线衍射法确定。结构分析表明,在所有配合物中,除1c以外,共晶形成物之间的基本识别是通过O-H···N / C-H···O成对氢键。由于存在N-氧化物官能团,因此在1c中,共晶形成剂通过O-H···O / C-H···O成对的氢键结合在一起。此外,尽管所有结构在三维包装中形成堆叠的片材布置,但是在二维布置内发现对比度差异,值得注意的观察是在1c结构中具有空隙的主体网络。此外,酸1和d形成两个不同的构象多晶型物,这是由于在酸1上占优势的两个-COOH基团的构型发生了变化,但在共晶形成剂之间具有相似的识别模式。

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