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首页> 外文期刊>Journal of the Chemical Society, Dalton Transactions. Inorganic Chemistry >Crystal supramolecular motifs for [Ph_4P]~+ salts of [M(mnt)_2]~(2-), [M(mnt)_2]~-, [{M(mnt)_2}_2]~(2-), [M(mnt)_3]~(3-) and [M(mnt)_3]~(2-) )mnt~(2-) = maleonitriledithiolate)
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Crystal supramolecular motifs for [Ph_4P]~+ salts of [M(mnt)_2]~(2-), [M(mnt)_2]~-, [{M(mnt)_2}_2]~(2-), [M(mnt)_3]~(3-) and [M(mnt)_3]~(2-) )mnt~(2-) = maleonitriledithiolate)

机译:[M(mnt)_2]〜(2-),[M(mnt)_2]〜-,[{M(mnt)_2} _2] _2]〜(2-),[Ph_4P]〜+盐的晶体超分子基序[M(mnt)_3]〜(3-)和[M(mnt)_3]〜(2-))mnt〜(2-)=顺丁烯二腈

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摘要

The crystal structures of [Ph_4P]_2[M(mnt)_2] (M = Zn 1, Cu 2 or Ni 3), [Ph_4P]_3[M(mnt)_2] (M = Cu 4 or Ni 5), [Ph_4P]_2[{M(mnt)_2}_2] (M = Co 6 or Fe 7). [Ph_4P]_2[M(mnt)_3] (M = Fe 8 or Cr 10) and [Ph_4P]_3[Cr(mnt)_3] 9 {mnt = maleonitriledithiolate, [S_2C_2(CN)_2]}~(2-) have been determined to investigated the packing and supramolecular motifs in crystals containing [Ph_4P]~- cations and [M(mnt)_n]~)z-) anion. Seven different crystal packings are described. Crystals 2 are isomorphous with 3, as are 4 with 5, and 6 with 7, and two dimorphs of 8 were identified (orthorhombic #alpha#-8 and monoclinic #beta#-8). The lattices of all compounds with planar (2, 3, 4, 5) or approximately planar (6, 7) anions contain segregated parallel stacks of anions (canted to the stack axis) and columns of embracing [Ph_4P]~+ cations. The structures of 2 and 3 contain approximately linear sequences of alternating sixfold phenyl embraces (6PE) and offset-face-to-face (OFF) motifs between cations, while the structures of 4, 5, 6 and 7 contain linear chains of cations engaged in translational fourfold phenyl embraces (4PE). Where the anions are not planar (tetrahedral 1 or octahedral 8-10). OFF interactions between planar subsections of the anions (i.e. mnt ligands)) and planar subsections of the cations (i.e. phenyl rings) occur, as a concerted motif involving for ions (1), or as a new sandwich motif (#alpha#-8, #beta#-8). This sandwich motif, Ph…mnt…Ph, occurs for one mnt ligand per anion in #alpha#-8, and two mnt ligands per anion in #beta#-8. Calculated energies are reported. weak C-H…S and C-H…N hydrogen bonds occur in all structures, and appear to control the details of the commensurability between chains of cations and stacks of anions. Edge-to-face (EF) motifs between phenyl rings and mnt ligands do not occur. All crystals except one (9) are devoid of solvent, implying an absence of shape awkwardness in crystals of this type. The crystal packing of the related compound [MePh_3P][Ni(mnt)_2] contains columns of stacked parallel fourfold phenyl embracing cations, parallel to stacked anions.
机译:[Ph_4P] _2 [M(mnt)_2](M = Zn 1,Cu 2或Ni 3),[Ph_4P] _3 [M(mnt)_2](M = Cu 4或Ni 5),[ Ph_4P] _2 [{M(mnt)_2} _2](M = Co 6或Fe 7)。 [Ph_4P] _2 [M(mnt)_3](M = Fe 8或Cr 10)和[Ph_4P] _3 [Cr(mnt)_3] 9 {mnt =顺丁烯二腈,[S_2C_2(CN)_2]}〜(2-已确定)以研究含有[Ph_4P]〜-阳离子和[M(mnt)_n]〜)z-)阴离子的晶体中的堆积和超分子基序。描述了七种不同的晶体填料。晶体2与3同构,4与5同构,6与7同构,并且鉴定出8的两个双晶型(斜方晶#alpha#-8和单斜晶#beta#-8)。所有具有平面(2、3、4、5)或近似平面(6、7)阴离子的化合物的晶格均包含分离的平行阴离子堆叠(倾斜到堆叠轴)和包含[Ph_4P]〜+阳离子的柱。 2和3的结构包含阳离子之间交替排列的六重苯基包围物(6PE)和错位面对面(OFF)基序的近似线性序列,而4、5、6和7的结构包含接合的阳离子线性链在翻译四重苯基环(4PE)中。阴离子不是平面的(四面体1或八面体8-10)。阴离子的平面部分(即mnt配体)和阳离子的平面部分(即苯环)之间发生OFF相互作用,是涉及离子的协同基序(1)或是新的三明治基序(#alpha#-8 ,#beta#-8)。该三明治基序Ph…mnt…Ph在#alpha#-8中每个阴离子一个mnt配体,在#beta#-8中每个阴离子两个mnt配体。报告计算出的能量。弱的C-H…S和C-H…N氢键出现在所有结构中,似乎控制着阳离子链与阴离子堆之间的可比性细节。在苯环和mnt配体之间不会出现边对面(EF)图案。除一个(9)外,所有晶体均不含溶剂,这意味着此类晶体不存在形状笨拙的情况。相关化合物[MePh_3P] [Ni(mnt)_2]的晶体堆积包含平行堆积的四重苯基环抱阳离子,与平行堆积的阴离子平行。

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