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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures of three N-ar­yl-2,2,2-tri­bromo­acetamides
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Crystal structures of three N-ar­yl-2,2,2-tri­bromo­acetamides

机译:三种N-芳基-2,2,2-三溴乙酰胺的晶体结构

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Three N-ar­yl-2,2,2-tri­bromo­acetamides, namely, 2,2,2-tri­bromo-N-(2-fluoro­phen­yl)­acetamide, C8H5Br3FNO, (I), 2,2,2-tri­bromo-N-[3-(tri­fluoro­methyl)­phen­yl]­acetamide, C9H5Br3F3NO, (II) and 2,2,2-tri­bromo-N-(4-fluoro­phen­yl)­acetamide, C8H5Br3FNO, (III) were synthesized and their crystal structures were analysed. In the crystal structure of (I), C—Br⋯πar­yl inter­actions connect the mol­ecules into dimers, which in turn are connected via Br⋯Br contacts [3.6519 (12) Å], leading to the formation of a one-dimensional ladder-type architecture. The crystal structure of (II) features chains linked by N—H⋯O and C—H⋯O hydrogen bonds. Two such chains are inter­linked to form ribbons through Br⋯Br [3.6589 (1) Å] and Br⋯F [3.0290 (1) Å] inter­actions. C—Br⋯πar­yl and C—F⋯πar­yl inter­actions between the ribbons extend the supra­molecular architecture of (II) from one dimension to two. In (III), the mol­ecules are connected into R22(8) dimers via pairs of C—H⋯F inter­actions and these dimers form ribbons through Br⋯Br [3.5253 (1) Å] contacts. The ribbons are further inter­linked into columns via C—Br⋯O=C contacts, forming a two-dimensional architecture.
机译:三种N-芳基-2,2,2-三溴乙酰胺,即2,2,2-三溴-N-(2-氟苯基)乙酰胺,C8H5Br3FNO,(I),2,2,2-三溴-N- [3合成了-(三氟甲基)苯基]乙酰胺,C9H5Br3F3NO,(II)和2,2,2-三溴-N-(4-氟苯基)乙酰胺,C8H5Br3FNO,(III),并对其晶体结构进行了分析。在(I)的晶体结构中,C-Br⋯芳基相互作用将分子连接成二聚体,而二聚体又通过Br⋯Br接触[3.6519(12)Å]连接,从而形成一维梯形-类型体系结构。 (II)的晶体结构具有通过NH 3 O和CH 3 O氢键连接的链。两条这样的链通过Br⋯Br [3.6589(1)]和Br⋯F [3.0290(1)]相互作用而相互连接形成带。带之间的C-Br⋯芳基和C-F⋯π芳基相互作用将(II)的超分子结构从一维延伸到二维。在(III)中,分子通过成对的C-H⋯F相互作用连接到R22(8)二聚体中,并且这些二聚体通过Br⋯Br [3.5253(1)]接触形成带。碳带通过C-Br⋯O = C触点进一步互连成列,从而形成二维结构。

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