首页> 外文期刊>Journal of chemical crystallography >Structural Investigation, UV-Vis Analysis and Crystal Packing of Spiro[chromeno[4,3-b]quinoline-6,1'-cycloalkan]-7-amine: Novel Tacrine Hybrids by Single Crystal X-Ray Diffraction
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Structural Investigation, UV-Vis Analysis and Crystal Packing of Spiro[chromeno[4,3-b]quinoline-6,1'-cycloalkan]-7-amine: Novel Tacrine Hybrids by Single Crystal X-Ray Diffraction

机译:螺螺螺蚊紫外线 - 可分析和晶体填料[Chromeno [4,3-B]喹啉-6,1'-环烷基] -7-胺:单晶X射线衍射新的胞焦杂交物

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摘要

The structure of four spiro[chromeno[4,3-b]quinoline-6,1'-cycloalkan]-7-amine (1-4) was determined by X-ray diffraction methods. The quinoline rings were obtained as almost planar structures, with an RMS deviation within a range of 0.0345-0.0641 , while the chromene rings are not planar. Moreover, the cycloalkane rings are attached to the chromene in spiro form. Three of the four compounds crystallize as solvates-one with ethanol and the other two with water. The crystal packing for compounds 1-4 is discussed in terms of intermolecular interactions, and it is shown that the crystal packing of these heterocycles is governed by: strong O-H center dot center dot center dot N and N-H center dot center dot center dot O hydrogen bonds; weak C-H center dot center dot center dot O and C-H center dot center dot center dot N hydrogen bonds; and very weak C-H center dot center dot center dot Cl, C-H center dot center dot center dot Br, and C-H center dot center dot center dot pi interactions. Also, pi center dot center dot center dot pi and lone pair center dot center dot center dot pi interactions are present in the crystal packing of the heterocycles. These interactions lead to the formation of endless chains along a plane, as well as supramolecular dimers and the arrangement of molecules in layers. Additionally, UV-Vis absorption spectra properties are also discussed.
机译:通过X射线衍射方法测定四种螺旋[Chromeno [4,3-B]喹啉-6,1'-环烷基] -7-胺(1-4)的结构。将喹啉环作为几乎平面结构获得,在0.0345-0.0641的范围内具有均方根的偏差,而铬环不平面。此外,环烷烃环以螺旋形式连接到铬烯上。四种化合物中的三种用乙醇和其他两种用乙醇结晶为溶剂化物。在分子间相互作用方面讨论了化合物1-4的晶体填料,结果表明,这些杂环的晶体包装受:强大的OH中心点中心点中心点N和NH中心点中心点中心点O氢气债券;弱C-H中心点中心点中心点O和C-H中心点中心点中心点N氢键;非常弱的C-H中心点中心点中心点CL,C-H中心点中心点中心点BR,以及C-H中心点中心点中心点PI相互作用。此外,PI中心点中心点中心点PI和孤立对中心点中心点中心点PI相互作用存在于杂环中。这些相互作用导致沿着平面形成无尽链,以及超分子二聚体和层中分子的排列。另外,还讨论了UV-Vis吸收光谱特性。

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