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首页> 外文期刊>Journal of Fluorine Chemistry >Supramolecular synthons in crystals of partially fluorinated fused aromatics:1,2,3,4-Tetrafluoronaphthalene and its aza-analogue 1,3,4-trifluoroisoquinolme
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Supramolecular synthons in crystals of partially fluorinated fused aromatics:1,2,3,4-Tetrafluoronaphthalene and its aza-analogue 1,3,4-trifluoroisoquinolme

机译:部分氟化稠合芳烃晶体中的超分子合成子:1,2,3,4-四氟萘及其氮杂类似物1,3,4-三氟异喹啉

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摘要

From X-ray diffraction data,the crystal lattice of 1,2,3,4-tetrafluoronaphthalene 1 is composed of infinite ir-stacks revealing pi-pi interactions of the arene-arene,arene-polyfluoroarene and polyfluoroarene-polyfluoroarene types.On replacement of the C2-F fragment of 1 by a N atom(i.e.in going from 1 to 1,3,4-trifluoroisoquinoline 2)the enlarged offset of neighboring molecules within the stacks excludes their PI-PI interactions,and only the F...pi interaction of fluorine atom of the Cl-F bond of one molecule with hydrocarbon ring of another is observed.Networks of shortened C-F...H-C(1 and 2)and N...H-C(2)contacts also contribute to supramolecular tectonics of the crystals.Quantum chemical calculations at the PBE/cc-pVTZ level of theory on dimers of 1 and 2 result in geometries somewhat different from those observed in the solid state.
机译:根据X射线衍射数据,1,2,3,4-四氟萘1的晶格由无限的ir堆栈组成,揭示了芳烃-芳烃,芳烃-多氟芳烃和多氟芳烃-多氟芳烃类型的pi-pi相互作用。 N原子(即从1到1,3,4-三氟异喹啉2)的1的C2-F片段的堆积中相邻分子的扩大偏移不包括它们的PI-PI相互作用,仅F.观察到一个分子的Cl-F键的氟原子与另一个分子的烃环的π相互作用。CF... HC(1和2)和N ... HC(2)接触缩短的网络也有助于超分子在1和2的二聚体理论上,在PBE / cc-pVTZ理论水平上进行的量子化学计算导致其几何形状与固态观察到的几何形状有些不同。

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