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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures and Hirshfeld surfaces of differently substituted (E)-N′-benzyl­idene-N-methyl-2-(thio­phen-2-yl)acetohydrazides
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Crystal structures and Hirshfeld surfaces of differently substituted (E)-N′-benzyl­idene-N-methyl-2-(thio­phen-2-yl)acetohydrazides

机译:(E)-N'-亚苄基-N-甲基-2-(噻吩-2-基)乙酰肼的取代度不同的晶体结构和Hirshfeld表面

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摘要

The syntheses and crystal structures of (E)-N′-(3-cyano­benzyl­idene)-N-methyl-2-(thio­phen-2-yl)acetohydrazide, C15H13N3OS, (I), and (E)-N′-(4-meth­oxy­benzyl­idene)-N-methyl-2-(thio­phen-2-yl)acetohydrazide, C15H16N2O2S, (II), with different substituents in the meta and para position of the benzene ring are described. Compounds (I) and (II) both crystallize with two mol­ecules in the asymmetric unit, with generally similar conformations [r.m.s. overlay fits for (I) and (II) of 0.334 and 0.280 Å, respectively] that approximate to L-shapes. The thio­phene rings in (I) are well ordered, whereas those in (II) exhibit `flip' rotational disorder [occupancies 0.662 (2) and 0.338 (2) for mol­ecule 1, and 0.549 (3) and 0.451 (3) for mol­ecule 2]. The packing for (I) features short C—H⋯O inter­actions arising from the C—H grouping adjacent to the cyanide group and C—H⋯Nc (c = cyanide) links arising from the methine groups to generate [110] double chains. Weak C—H⋯π inter­actions inter­link the chains into a three-dimensional network. The packing for (II) features numerous C—H⋯O and C—H⋯π inter­actions arising from different donor groups to generate a three-dimensional network. Hirshfeld fingerprint plots indicate significant differences in the percentage contact surfaces for (I) and (II).
机译:(E)-N'-(3-氰基苄叉基)-N-甲基-2-(噻吩-2-基)乙酰肼,C15H13N3OS,(I)和(E)-N'-(4的合成和晶体结构描述了在苯环的间位和对位具有不同取代基的-甲氧基亚苄基)-N-甲基-2-(噻吩-2-基)乙酰肼,C15H16N2O2S,(II)。化合物(Ⅰ)和(Ⅱ)均以不对称单元中的两个分子结晶,其构型基本相似。 (I)和(II)分别为0.334和0.280?Å的重叠拟合]近似于L形。 (I)中的噻吩环是有序的,而(II)中的噻吩环表现出“翻转”旋转紊乱[分子1的占据率为0.662(2)和0.338(2),分子为0.549(3)和0.451(3) 2]。 (I)的堆积具有与氰基相邻的CH基团引起的短CHOH相互作用,以及由次甲基产生的CHHNc(c =氰化物)键生成[110]双链。弱的C-H⋯π相互作用将链互连成三维网络。 (II)的填充物具有来自不同供体基团的大量C-H⋯O和C-H⋯π相互作用,从而生成三维网络。 Hirshfeld指纹图表明(I)和(II)的接触表面百分比显着不同。

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