Synthesis and structural analysis of 2,11-diaza[3.3](3,5)pyridinophaneElectronic supplementary information (ESI) available: 3D coordinates for compounds 1 and 6 and for the three calculated conformers of compound 1 (1BB, 1CB and 1CC). See http://www.rsc.org/suppdata/p2/b2/b200402j/
作者:Teizi Satou、Teruo Shinmyozu
DOI:10.1039/b200402j
日期:2002.2.25
A possible bidentate receptor with two kinds of nitrogen atoms, 2,11-diaza[3.3](3,5)pyridinophane 1, was synthesized. A VT 1H NMR study and ab initio MO calculations indicated that the two conformers of 1, boat–boat and chair–boat, have almost the same stabilities. The free energy barrier ΔG‡ for the conformational change is estimated to be 10.4 kcal mol−1 (Tc
=
−55 °C). An X-ray crystallographic study revealed that 1 forms a hydrogen-bonding network in the crystalline state.
我们合成了一种可能具有两种氮原子的双齿受体--2,11-二氮杂[3.3](3,5)吡啶玢 1。VT 1H NMR 研究和 ab initio MO 计算表明,1 的两种构象(舟舟型和椅舟型)具有几乎相同的稳定性。据估计,构象变化的自由能障 ΔG‡ 为 10.4 kcal mol-1(Tc = -55℃)。X 射线晶体学研究表明,1 在晶体状态下形成了氢键网络。