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首页> 外文期刊>Chemistry: A European journal >N center dot center dot center dot Br halogen bonding: One-dimensional infinite chains through the self-assembly of dibromotetrafluorobenzenes with dipyridyl derivatives
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N center dot center dot center dot Br halogen bonding: One-dimensional infinite chains through the self-assembly of dibromotetrafluorobenzenes with dipyridyl derivatives

机译：N中心点中心点中心点Br卤素键：通过二溴四氟苯与二吡啶基衍生物的自组装形成一维无穷链

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摘要

The N...Br halogen bonding drives the self-assembly of 1,4-dibromotetrafluorobenzene (1a) and its 1,3 or 1,2 analogues (1b,c, respectively) with dipyridyl derivatives 2a,b. The isomeric supramolecular architectures 3a-f are obtained as cocrystals that are stable in the air at room temperature. The solidstate features of these 1D infinite chains 3 have been fully characterized by single-crystal X-ray, Raman, and IR analyses. The occurrence of N...Br halogen bonding in solution has been detected with F-19 NMR spectroscopy. The N...Br halogen bonding is highly selective and directional and the geometry of the single strands of noncovalent copolymers 3 is programmed by the geometry of halogen-bonding donor and acceptor sites on the starting modules. The composition and topology of the instructed networks can be predicted with great accuracy. Experiments of competitive cocrystal formation established the strength of the N...Br interaction relative to other halogen bondings and the ability of different modules 1 to be involved in site-selective supramolecular syntheses. [References: 99]
机译：N ... Br卤素键驱动1，4-二溴四氟苯（1a）及其1,3或1,2类似物（分别为1b，c）与二吡啶基衍生物2a，b的自组装。获得的共聚异构体超分子结构3a-f在室温下在空气中稳定。这些1D无限链3的固态特征已通过单晶X射线，拉曼和IR分析得到充分表征。用F-19 NMR光谱检测到溶液中N ... Br卤素键的存在。 N ... Br卤素键具有高度的选择性和方向性，并且非共价共聚物3的单链的几何形状是通过起始模块上的卤素键结合的供体和受体位点的几何形状进行编程的。指令网络的组成和拓扑可以非常准确地预测。竞争性共晶形成的实验确定了N ... Br相互作用相对于其他卤素键的强度以及不同模块1参与位点选择性超分子合成的能力。 [参考：99]

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