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Structural investigation of model compounds for an acceptor component of a new type of charge-transfer complexes based on viologen analogues. Characteristic features of the molecular and supramolecular structures

机译:基于紫精类似物的新型电荷转移复合物受体结构模型化合物的结构研究。分子和超分子结构的特征

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The crystal and molecular structures of six perchlorates (viologen analogues) are studied. These compounds serve as models of the acceptor component of new charge-transfer complexes containing bis(18-crown-6)stilbene as the donor. The polycyclic aromatic system of divalent cations is demonstrated to be virtually planar. In all cations, the side chains at the nitrogen atoms are oriented in opposite directions almost perpendicular to the plane of the cyclic system. This orientation of the spacers of these carbocations is indicative of their preorganization for the formation of 1:2 charge-transfer complexes. Analysis of the crystal packings provides evidence that two positive charges on the conjugated systems of the organic cations and the perchlorate anions play a destructive role in the formation of stacking motifs. An increase in the size of the conjugated system and the involvement of an aromatic solvent molecule as an additional building block in a supramolecular system are favorable for the formation of a stacking supramolecular architecture. (c) 2005 Pleiades Publishing, Inc.
机译:研究了六种高氯酸盐(紫精类似物)的晶体和分子结构。这些化合物充当含有双(18-冠-6)二苯乙烯作为供体的新型电荷转移复合物的受体组分的模型。二价阳离子的多环芳族体系被证明实际上是平面的。在所有阳离子中,氮原子上的侧链均以几乎垂直于循环系统平面的相反方向取向。这些碳阳离子的间隔基的这种取向表明它们为形成1:2电荷转移复合物而预先组织。晶体堆积的分析提供了证据,表明有机阳离子和高氯酸根阴离子共轭体系上的两个正电荷在堆积图案的形成中起破坏作用。共轭体系的尺寸的增加和芳香族溶剂分子作为超分子体系中额外的构建基团的参与有利于堆叠超分子体系的形成。 (c)2005年Pleiades Publishing,Inc.

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