Specific Noncovalent Association of Chiral Large-Ring Hexaimines: Ion Mobility Mass Spectrometry and PM7 Study
作者:Anna Troć、Jadwiga Gajewy、Witold Danikiewicz、Marcin Kwit
DOI:10.1002/chem.201602515
日期:2016.9.5
Ion mobility mass spectrometry and PM7 semiempirical calculations are effective complementary methods to study gas phase formation of noncovalent complexes from vaselike macrocycles. The specific association of large‐ring chiral hexaimines, derived from enantiomerically pure trans‐1,2‐diaminocyclohexane and various isophthaldehydes, is driven mostly by CH–π and π–π stacking interactions. The isotrianglimine
离子迁移质谱和PM7半经验计算是研究花瓶状大环化合物非共价配合物气相形成的有效补充方法。由对映体纯的反式1,2-二氨基环己烷和各种异乙醛衍生的大环手性己亚胺的特定缔合主要是由CH– π和π – π驱动的堆叠互动。isotrianglimine大环化合物易于形成两种类型的聚集体:尾对尾和头对头(胶囊)二聚体。尾到尾二聚体的稳定性受芳香环C-5位置取代基的大小和电子性质影响。吸电子基团使聚集体稳定,而庞大的或给电子基团使复合物不稳定。