The compound N-(2-carboxyphenyl)-exo-7-oxa-bicyclo[2,2,1]hept-5-ene-2,3-dicarboximide (C15H11NO5, Mr = 285.25) was synthesized and characterized by elemental analysis, 1H NMR spectra, IR spectra and single crystal X-ray diffraction. The crystal belongs to monoclinic, space group P21/n, with a = 8.4994(8), b = 14.6499(15), c = 10.2880(10) Å, b = 101.5890(10)º, V = 1254.9(2) Å3, Z = 4, Dc = 1.510 g/cm3, l = 0.71073 Å, (MoKa) = 0.115 mm-1, F(000) = 592. The final refinement gave R = 0.0374, wR(F2) = 0.0856 for 2,201 observed reflections with I > 2s(I). The structure of the compound comprises a racemic mixture of chiral molecules containing four stereogenic centres. X-Ray diffraction analysis reveals that the cyclohexane ring tends towards a boat conformation, the tetrahydrofuran ring and the dihydrofuran ring adopt envelope conformations. The dihedral angle between the pyrrolidine-2,5-dione plane and the aromatic ring is 65.0 (1)º. The crystal structure is stabilized by O-H···O and C-H···O hydrogen bonds.
合成了化合物N-(2-羧基苯基)-exo-7-氧杂-双环[2,2,1]庚-5-烯-2,3-二甲
酰亚胺(
C15H11NO5, Mr = 285.25),并通过元素分析进行表征, 1H NMR谱、IR谱和单晶X射线衍射。该晶体属于单斜晶系,空间群P21/n,a = 8.4994(8),b = 14.6499(15),c = 10.2880(10) Å,b = 101.5890(10)º,V = 1254.9(2) Å3 ,Z = 4,Dc = 1.510 g/cm3,l = 0.71073 Å,(MoKa) = 0.115 mm-1,F(000) = 592。对于 I > 2s(I) 的 2,201 个观察到的反射,最终细化得出 R = 0.0374、wR(F2) = 0.0856。该化合物的结构包含含有四个立体中心的手性分子的外消旋混合物。 X射线衍射分析表明,
环己烷环趋于船形构象,
四氢呋喃环和二氢
呋喃环呈包络构象。
吡咯烷-2,5-二酮平面与芳香环之间的二面角为65.0 (1)°。晶体结构通过O-H···O和C-H···O氢键稳定。