Various substituents have been introduced into the inner or the outer position of the dithia[3.3.1]metacyclophanes (MCPs). Conformational properties of these MCPs are evaluated by variable temperature 1H-NMR spectral measurements, IR measurements, computer calculation and X-ray structural analyses. It has been found that the conformations of dithia[3.3.1]MCPs are affected by not only the steric effect of the inner or the outer substituent but also by the electronic nature of the component aromatic ring. Furthermore, a weak interaction such as NH–π interaction or hydrogen-bonding also regulates their conformation.
已经在二
硫[3.3.1]甲环烷(MCPs)的内位或外位引入了多种取代基。这些MCPs的构象特性通过变温1H-NMR光谱测量、红外测量、计算机计算和X射线结构分析进行了评估。研究发现,二
硫[3.3.1]MCPs的构象不仅受到内外取代基立体效应的影响,还受到组成芳香环的电子性质的影响。此外,如NH–π相互作用或氢键等微弱相互作用也会调节它们的构象。