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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Fine-tuning of biaryl dihedral angles: structural characterization of five homologous three-atom bridged biphenyls by X-ray crystallography
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Fine-tuning of biaryl dihedral angles: structural characterization of five homologous three-atom bridged biphenyls by X-ray crystallography

机译：联芳基二面角的微调：X射线晶体学表征的五个同源的三原子桥联苯的结构特征

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摘要

The homologous series of three-atom bridged biaryls comprising 5,7-dihydro-1,2,3,9,10,11-hexamethoxydibenzo[c,e] oxepine, 6,7-dihydro-1,2,3,9,10,11-hexamethoxy-6-methyl-5H-dibenzo[c,e]azepinium chloride, 5,7-dihydro-1,2,3,9,10,11-hexamethoxydibenzo[c,e]thiepine, and the 6-oxide and 6,6-dioxide derivatives of the latter have been characterized by X-ray crystal structure analysis. Within this series the endocyclic and exocyclic biaryl dihedral angles vary over 10° ranges, reflecting the changing balance of intramolecular (steric, geometric) and intermolecular (crystal packing) forces, the former being potential control elements for fine-tuning the helicity of the biaryl system.
机译：包含5,7-二氢-1,2,3,9,10,11-六甲氧基二苯并[c，e]氧杂环丁烷，6,7-二氢-1,2,3,9， 10,11-六甲氧基-6-甲基-5H-二苯并[c，e] a嗪，5,7-二氢-1,2,3,9,10,11-六甲氧基二苯并[c，e]噻吩和6 X射线晶体结构分析已表征了后者的α-氧化物和6，6-二氧化物衍生物。在该系列中，环内和环外联芳基二面角变化超过10°。范围，反映了分子内（空间，几何）和分子间（晶体堆积）力变化的平衡，前者是微调联芳基体系螺旋度的潜在控制元素。

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