Crystal Structure and Conformation Study of 3-Methyl-2, 6-bis (4-chlorophenyl) Piperidin-4-one Thiosemicarbazone Derivative
作者:N. Sampath、Rita Mathews、M. N. Ponnuswamy
DOI:10.1007/s10870-010-9802-y
日期:2010.12
Thiosemicarbazones (TSCs) are very versatile tridentate ligands having the ability to bind transition metal ions by bonding through sulfur and hydrazinic terminal nitrogen atoms. TSC also inhibits the enzyme ribonucliotide diphosphate reductase (RDR) which is involved in the synthesis of DNA precursors in the mammalian cells. One of the important heterocyclic thiosemicarbazones, the title compound (MBCPT) has been synthesized based on the Mannich reaction and it was characterized by X-ray diffraction methods. The crystallographic data of MBCPT are: C19H20Cl2N4S; M.W = 407.35, Monoclinic, space group, P21/n, with cell parameters a = 12.053(8) Å, b = 11.431(10) Å, c = 14.695(7) Å, β = 95.82(4)º; V = 2014(2) Å3, Z = 4, Dcal = 1.343 Mg/m3, λ (Cu K α ) = 1.54184 Å. The ring piperine adopts chair conformation. The phenyl rings are oriented equatorially at 2 and 6th positions of the piperidine ring. Molecular packing can be viewed as a dimer held together by two N–H⋯S intermolecular hydrogen bonds. Molecules are tightly bound in the unit cell by C–H⋯N, N–H⋯S and N–H⋯N types inter and intra molecular hydrogen bonds. One of the piperidin-4-one thiosemisemicarbazones, MBCPT, has been synthesized and its structural chemistry has been proved by X-ray crystallographic study.
硫代氨基脲(TSC)是一种用途广泛的三叉配体,能够通过硫和肼端氮原子结合过渡金属离子。TSC 还能抑制核糖核苷酸二磷酸还原酶(RDR),该酶参与哺乳动物细胞中 DNA 前体的合成。根据曼尼希反应合成了重要的杂环硫代氨基甲酸盐之一--标题化合物(MBCPT),并通过 X 射线衍射方法对其进行了表征。MBCPT 的晶体学数据如下C19H20Cl2N4S;M.W = 407.35,单斜,空间群,P21/n,晶胞参数 a = 12.053(8) Å, b = 11.431(10) Å, c = 14.695(7) Å, β = 95.82(4)º; V = 2014(2) Å3, Z = 4, Dcal = 1.343 Mg/m3, λ (Cu K α ) = 1.54184 Å.哌啶环呈椅状构象。苯基环在哌啶环的第 2 位和第 6 位呈等距排列。分子堆积可以看作是由两个 N-H⋯S 分子间氢键结合在一起的二聚体。分子通过 C-H⋯N、N-H⋯S 和 N-H⋯N 类型的分子间和分子内氢键紧密结合在单位胞中。我们合成了一种哌啶-4-酮硫代异emicarbazones,并通过 X 射线晶体学研究证明了其化学结构。