...
首页> 外文期刊>Crystal growth & design >Crystal Engineering of Organic Salts: Hydrogen-Bonded Supramolecular Motifs in Trimethoprim Sorbate Dihydrate and Trimethoprim o-Nitrobenzoate
【24h】

Crystal Engineering of Organic Salts: Hydrogen-Bonded Supramolecular Motifs in Trimethoprim Sorbate Dihydrate and Trimethoprim o-Nitrobenzoate

机译:有机盐的晶体工程:甲氧苄啶山梨酸酯二水合物和甲氧苄啶邻硝基苯甲酸酯中的氢键超分子基序

获取原文
获取原文并翻译 | 示例
           

摘要

In the crystal structures of two organic salts, namely, trimethoprim sorbate dihydrate (1) and trimethoprim-o-nitrobenzoate (2), the pyrimidine moieties of trimethoprim are protonated at one of the ring nitrogens. In both the compounds, the carboxylate oxygens are hydrogen-bonded to the protonated pyrimidine rings to form the hydrogen-bonded cyclic bimolecular motif. These motifs further self-organize in two different ways to give different types of hydrogen-bonded networks in the two crystal structures. In compound 1, the two inversion related motifs pair through a pair of N-H…N hydrogen bonds involving an unprotonated ring nitrogen and 4-amino group. In addition to this pairing, one of the water oxygens bridges the 2- and 4-amino groups on both sides of pairing to form a complementary DADA (D refers to the hydrogen-bond donor and A refers to the hydrogen-bond acceptor) array of quadruple hydrogen bonds. In compound 2, there is no base-pairing, and the cyclic hydrogen-bonded bimolecular motifs self-assemble into a hydrogen-bonded supramolecular ladder through N-H…O and C-H…O hydrogen bonds. The o-nitrobenzoate ions form a supramolecular chain, the ions being linked by aromatic C-H…O (of the nitro group) hydrogen bonds.
机译:在两种有机盐的晶体结构中,即甲氧苄啶山梨酸酯二水合物(1)和甲氧苄啶邻硝基苯甲酸酯(2),甲氧苄氨嘧啶的嘧啶部分在一个环氮上质子化。在这两种化合物中,羧酸氧原子氢键合到质子化的嘧啶环上,形成氢键合的环状双分子基序。这些基序进一步以两种不同的方式自组织,以在两种晶体结构中产生不同类型的氢键网络。在化合物1中,两个与反转有关的基序通过一对涉及未质子化环氮和4-氨基的N-H…N氢键配对。除此配对外,一个水氧桥将配对两侧的2-和4-氨基桥接形成互补的DADA(D表示氢键供体,A表示氢键受体)阵列四个氢键。在化合物2中,没有碱基配对,环状的氢键结合的双分子基序通过N-H…O和C-H…O氢键自组装成氢键结合的超分子阶梯。邻硝基苯甲酸酯离子形成一个超分子链,这些离子通过(硝基)芳族C-H…O氢键连接。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号