Synthesis, crystal structure and crystal packing of diaza[5]helicenes
Synthesis, crystal structure and crystal packing of diaza[5]helicenes
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DOI：
10.1039/b800050f
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发表时间：
2008-01-01
影响因子：
3.3
通讯作者：
Sironi, Angelo
中科院分区：
文献类型：
--
作者：
Bazzini, Cristina;Caronna, Tullio;Sironi, Angelo
对已知氮杂[5]螺烯的晶体堆积进行了分析，并用核磁共振波谱和X射线衍射法对新合成的一些二氮杂[5]螺烯物种进行了表征。与碳[5]螺烯和单氮杂[5]螺烯的比较强调了“形状因子”的重要性(负责系列中某些物种之间的同构)以及缺乏独特的超分子效应来组织晶体中的分子(导致观察到的某些化合物的多形性)。
Analysis of the crystalline packing of known aza[5]helicenes is presented together with some newly synthesized diaza[5] helicenes species, characterized by NMR spectroscopy and X-ray diffraction. The comparison with carbo[5] helicenes and monoaza[5] helicenes emphasizes the importance of the "shape factor'' (responsible of the isomorphism between some species in the series) as well as the lack of a unique supramolecular effect organizing the molecules in the crystals (responsible for the polymorphism observed for some compounds).