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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures of the 2:2 complex of 1,1′-(1,2-phenyl-ene)bis-(3-m-tolyl-urea) and tetra-butyl-ammonium chloride or bromide
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Crystal structures of the 2:2 complex of 1,1′-(1,2-phenyl-ene)bis-(3-m-tolyl-urea) and tetra-butyl-ammonium chloride or bromide

机译:1,1'-(1,2-亚苯基)双-(3-间甲苯基-脲)与四丁基氯化铵或溴化物的2:2配合物的晶体结构

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The title compounds, tetra-butyl-ammonium chloride–1,1′-(1,2-phenyl-ene)bis-(3-m-tolyl-urea) (1/1), C16H36N+·Cl?·C22H22N4O2 or [(n-Bu4N+·Cl?)(C22H22N4O2)] (I) and tetra-butyl-ammonium bromide–1,1′-(1,2-phenyl-ene)bis-(3-m-tolyl-urea) (1/1), C16H36N+·Br?·C22H22N4O2 or [(n-Bu4N+·Br?)(C22H22N4O2)] (II), both comprise a tetra-butyl-ammonium cation, a halide anion and an ortho-phenyl-ene bis-urea mol-ecule. Each halide ion shows four N—H?X (X = Cl or Br) inter-actions with two urea receptor sites of different bis-urea moieties. A crystallographic inversion centre leads to the formation of a 2:2 arrangement of two halide anions and two bis-urea mol-ecules. In the crystals, the dihedral angle between the two urea groups of the bis-urea mol-ecule in (I) [defined by the four N atoms, 165.4?(2)°] is slightly smaller than that in (II) [167.4?(2)°], which is probably due to the smaller ionic radius of chloride compared to bromide.
机译:标题化合物,氯化四丁基铵-1,1'-(1,2-亚苯基)双-(3-间甲苯基-脲)(1/1),C16H36N +·Cl2·C22H22N4O2或[ (n-Bu4N +·Cl?)(C22H22N4O2)](I)和四丁基溴化铵–1,1'-(1,2-亚苯基)双-(3-m-甲苯基-脲)(1 / 1),C16H36N +·Br2·C22H22N4O2或[(n-Bu4N +·Br2)(C22H22N4O2)](II),均包含四丁基铵阳离子,卤化物阴离子和邻苯基亚苯基双-尿素分子。每个卤离子显示出与不同双脲部分的两个尿素受体位点之间的四个NH x(X = Cl或Br)相互作用。晶体学上的反转中心导致两个卤化物阴离子和两个双脲分子孔的2:2排列的形成。在晶体中,(I)中双脲分子的两个脲基之间的二面角[由四个N原子定义,为165.4°(2)°]略小于(II)中的[167.4] δ(2)°],这可能是由于氯化物的离子半径比溴化物小。

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