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Tris(pyridinium)triazine in crystal synthesis of 3-fold symmetric structures

机译:三(吡啶)三嗪在3倍对称结构的晶体合成中

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摘要

A series of perchlorometalate salts of the [1,3,5-tris(R)-2,4,6-triazine](3+) trications, where R = 4-, 3-, or 2-pyridinium, have been prepared and structurally characterized. The supramolecular motifs in these salts show striking similarities despite differences in the local position of the pyridinium NH group, the metal atom used, and the incorporation of water molecules in the structure. A supramolecular motif in which the near-planar cations are surrounded by an octahedral array of six octahedral trianions is observed in the majority of the new salts. The crystal structures of [1,3,5-tris(4-pyridinium)-2,4,6-triazine] [SbCl6] (4), [1,3,5-tris(4-pyridinium)-2,4,6-triazine] [BiCl6] (5), [1,3,5-tris(3-pyridinium)-2,4,6-triazine] [SbCl6] (8), [1,3,5-tris(3-pyridinium)-2,4,6-triazine] [BiCl6] (9), and [1,3,5-tris(3-pyridinium)-2,4,6-triazine] [FeCl6] (10) are essentially isostructural; [1,3,5-tris(4-pyridinium)-2,4,6-triazine]2[FeCl6][FeCl4](3) (6), [1,3,5-tris(2-pyridinium)-2,4,6-triazine][SbCl6]center dot 3H(2)O (11), and [1,3,5-tris(2-pyridinium)-2,4,6-triazine] [BiCl6]center dot 3H(2)O (12) show related supramolecular structural motifs. The crystal structures of all of 4, 5, 8, 9, 10, and 12 are of R3c or R (3) over barc symmetry and have similar cell dimensions (a = b = 14.6-15.2 angstrom, c = 18.5-19.2 angstrom) reflecting the planarity and Mold symmetry of the cations. The structures appear to be stabilized by complementary Cl center dot center dot center dot HN, Cl center dot center dot center dot HO, Cl center dot center dot center dot HC, and NH center dot center dot center dot O hydrogen bonding, shape, and electrostatic interactions and unanticipated triazine C center dot center dot center dot Cl interactions.
机译:制备了一系列[1,3,5-tris(R)-2,4,6-三嗪](3+)trictrics的全氯金属酸盐,其中R = 4-,3-或2-吡啶鎓和结构上的特点。这些盐中的超分子基序显示出惊人的相似性,尽管吡啶鎓NH基团的局部位置,所使用的金属原子以及结构中水分子的掺入不同。在大多数新盐中均观察到超分子基序,其中近平面阳离子被六个八面体三价阴离子的八面体阵列包围。 [1,3,5-三(4-吡啶)-2,4,6-三嗪] [SbCl6](4),[1,3,5-三(4-吡啶)-2,4 ,6-三嗪] [BiCl6](5),[1,3,5-三(3-吡啶)-2,4,6-三嗪] [SbCl6](8),[1,3,5-tris( 3-吡啶鎓)-2,4,6-三嗪] [BiCl6](9)和[1,3,5-三(3-吡啶鎓)-2,4,6-三嗪] [FeCl6](10)是本质上是同构的; [1,3,5-三(4-吡啶)-2,4,6-三嗪] 2 [FeCl6] [FeCl4](3)(6),[1,3,5-三(2-吡啶)- 2,4,6-三嗪] [SbCl6]中心点3H(2)O(11)和[1,3,5-tris(2-吡啶)-2,4,6-三嗪] [BiCl6]中心点3H(2)O(12)显示了相关的超分子结构图案。在barc对称性上,所有4、5、8、9、10和12的晶体结构均为R3c或R(3),并且具有相似的晶胞尺寸(a = b = 14.6-15.2埃,c = 18.5-19.2埃)反映了阳离子的平面度和模具对称性。互补的Cl中心点中心点中心点HN,Cl中心点中心点中心点HO,Cl中心点中心点中心点HC和NH中心点中心点中心点O的氢键,形状和静电相互作用和不可预料的三嗪C中心点中心点中心点Cl相互作用。

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