作者:Sampath Natarajan、Rita Mathews
DOI:10.1007/s10870-010-9951-z
日期:2011.5
Two crystal structures of acridinediones namely, TMHAD and MPHAD were studied by X-ray crystallographic method in view of their occurrence in numerous commercial products including pharmaceuticals, fragrances and dyes. Crystal data of TMHAD are: C17H23NO2, orthorhombic, Fdd2, with cell parameters a = 40.417(6) Å, b = 5.744(1) Å, c = 12.979(2) Å, V = 3013.1(7) Å3, Z = 8, Dcal = 1.205 Mg/m3, μ = 0.078 mm−1. Crystal data of MPHAD are: C20H18NO3; monoclinic, P21/c with cell parameters a = 10.182(9) Å, b = 17.105(14) Å, c = 10.895(9) Å, β = 117.857(1)°, V = 1678(2) Å3, Z = 4, Dcal = 1.268 Mg/m3, μ = 0.085 mm−1. Both data were collected using λ (MoKα) = 0.71073 Å. The central ring in the acridinedione moieties tends to be planar while the outer two rings adopt sofa conformations. Intermolecular interactions of C–H···O type of hydrogen bond help the molecules to stabilize into the crystal packing. Interestingly, a week forces of C–H···π interactions also helps the molecules for stabilization. Two crystal structures of acridinediones namely, TMHAD and MPHAD have been synthesized and its structural chemistry has been proved by crystallographic study.
鉴于吖啶二酮(TMHAD 和 MPHAD)存在于包括药品、香料和染料在内的众多商业产品中,本研究采用 X 射线晶体学方法对这两种吖啶二酮的晶体结构进行了研究。TMHAD 的晶体数据如下C17H23NO2, orthorhombic, Fdd2, 晶胞参数 a = 40.417(6) Å, b = 5.744(1) Å, c = 12.979(2) Å, V = 3013.1(7) Å3, Z = 8, Dcal = 1.205 Mg/m3, μ = 0.078 mm−1.MPHAD 的晶体数据为C20H18NO3;单斜,P21/c,晶胞参数 a = 10.182(9) Å, b = 17.105(14) Å, c = 10.895(9) Å, β = 117.857(1)°, V = 1678(2) Å3, Z = 4, Dcal = 1.268 Mg/m3, μ = 0.085 mm−1.这两个数据都是使用 λ (MoKα) = 0.71073 Å 采集的。吖啶二酮分子的中心环倾向于平面构象,而外侧两个环则采用沙发构象。分子间的 C-H-O 型氢键相互作用有助于分子稳定地形成晶体结构。有趣的是,C-H--π相互作用的一周力也有助于分子的稳定。我们合成了两种吖啶二酮的晶体结构,即 TMHAD 和 MPHAD,并通过晶体学研究证明了其结构化学性质。