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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Supra­molecular inter­actions in 2,6-di­amino-4-chloro­pyrimidin-1-ium 5-chloro­salicylate and bis­(2,6-di­amino-4-chloro­pyrimidin-1-ium) naphthalene-1,5-di­sulfonate
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Supra­molecular inter­actions in 2,6-di­amino-4-chloro­pyrimidin-1-ium 5-chloro­salicylate and bis­(2,6-di­amino-4-chloro­pyrimidin-1-ium) naphthalene-1,5-di­sulfonate

机译:2,6-二氨基-4-氯嘧啶-1-鎓5-氯水杨酸酯和双(2,6-二氨基-4-氯嘧啶-1-鎓)萘-1,5-二磺酸酯的超分子相互作用

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The crystals of two new salts, 2,6-di­amino-4-chloro­pyrimidin-1-ium 5-chloro­salicylate, C4H6ClN4+·C7H4ClO3−, (I), and bis­(2,6-di­amino-4-chloro­pyrimidin-1-ium) naphthalene-1,5-di-sulfonate, 2C4H6ClN4+·C10H6O6S22−, (II), have been synthesized and characterized by single-crystal X-ray diffraction. In both compounds, the N atom of the pyrimidine group in between the amino substituents is protonated and the pyrimidinium cation forms a pair of N—H⋯O hydrogen bonds with the carboxyl­ate/sulfonate ion, leading to a robust R22(8) motif (supra­molecular heterosynthon). In compound (I), a self-complementary base pairing involving the other pyrimidinium ring nitro­gen atom and one of the amino groups via a pair of N—H⋯N hydrogen bonds [R22(8) homosynthon] is also present. In compound (II), the crystallographic inversion centre coincides with the inversion centre of the naphthalene-1,5-di­sulfonate ion and all the sulfonate O atoms are hydrogen-bond acceptors, generating fused-ring motifs and a quadruple DDAA array. A halogen-bond (Cl⋯Cl) inter­action is present in (I) with a distance and angle of 3.3505 (12) Å and 151.37 (10)°, respectively. In addition, a C—Cl⋯π inter­action and a π–π inter­action in (I) and a π–π inter­action in (II) further stabilize these crystal structures.
机译:两种新盐的晶体:5-氯水杨酸2,6-二氨基-4-氯嘧啶-1-鎓,C4H6ClN4 +·C7H4ClO3-,(I)和双(2,6-二氨基-4-氯嘧啶-1-鎓)的晶体合成了1,5-二磺酸萘,2C4H6ClN4 +·C10H6O6S22-(II),并通过单晶X射线衍射进行了表征。在这两种化合物中,氨基取代基之间的嘧啶基团的N原子均质子化,嘧啶鎓阳离子与羧酸根/磺酸根离子形成一对N-H⋯O氢键,从而形成坚固的R22(8)基序(超分子杂合子)。在化合物(I)中,还存在通过另一个NH-HN氢键[R22(8)高合成基团]包含另一个嘧啶环氮原子和一个氨基的自互补碱基配对。在化合物(II)中,晶体学反转中心与-1,5-二磺酸萘离子的反转中心重合,并且所有磺酸盐O原子都是氢键受体,产生稠环图案和四倍的DDAA阵列。 (I)中存在卤素键(Cl⋯Cl)相互作用,其距离和角度分别为3.3505(12)Å和151.37(10)°。此外,(I)中的C-Cl⋯π相互作用和π-π相互作用以及(II)中的π-π相互作用进一步稳定了这些晶体结构。

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