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首页> 外文期刊>Journal of chemical crystallography >Near-perfect dipole parallel-alignment in the highly anisotropic crystal structure of 4-iodoacetophenone-(4-methoxyphenylethylidene) hydrazone
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Near-perfect dipole parallel-alignment in the highly anisotropic crystal structure of 4-iodoacetophenone-(4-methoxyphenylethylidene) hydrazone

机译:4-碘苯乙酮-(4-甲氧基苯基亚乙基)的高度各向异性晶体结构中的近乎完美的偶极平行排列

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摘要

The title compound crystallizes in the space group Pna2(1) with cell parameters a = 6.4606(3), b = 7.2155(3) and c = 33.5878(16) A. The azine shows a gauche conformation about the N-N bond and there is an angle of 58.1° between the benzene rings of each azine. This conformation allows for two intermolecular arene-arene T-contacts between pairs of benzene rings. The characteristic structural motif features T-contact formation between like-substituted arene rings and this architecture results in a highly dipole-parallel aligned lattice. All azines are perfectly colinear within each layer and the orientations of the azines in different layers are nearly the same. The surfaces of the layers exhibit a quadrilateral kite-shaped arrangement of I-atoms and of OCH_3-substituents. The layers pack such that the OCH_3-carbon atoms are placed above the interstices between the I-atoms in the adjacent layer.
机译:标题化合物在单元格参数a = 6.4606(3),b = 7.2155(3)和c = 33.5878(16)A的空间群Pna2(1)中结晶。嗪显示关于NN键的gauche构象,并且存在每个嗪的苯环之间的夹角为58.1°。该构象允许成对的苯环之间的两个分子间的芳烃-芳烃T-接触。独特的结构基序的特征是在类似取代的芳烃环之间形成T接触,并且这种结构导致高度偶极平行排列的晶格。每层中的所有杂志都是完全共线的,并且不同层中的杂志的方向几乎相同。层的表面表现出I原子和OCH_3取代基的四边形风筝形排列。这些层堆积成使得OCH_3-碳原子位于相邻层中的I原子之间的间隙上方。

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