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Anion-directed organized assemblies of protonated pyrazole-based ionic salts

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Abstract

The reactions of 3(5)-(4-methoxyphenyl)-5(3)-phenyl-1H-pyrazole (L 1) with nitric acid and 5-(4-benzyloxyphenyl)-3-(furan-2-yl)-1H-pyrazole(L 2) with hydrochloric acid produced [HL 1 · NO3] (Salt-1) and [HL 2 · Cl] (Salt-2). The structures of Salt-1 and Salt-2 were determined by single crystal X-diffraction. In Salt-1, HL 1 showed [2 + 2] binding of NO3 − ions in the solid state to form dimer architecture with R 21 (4) and R 44 (14) graph sets. An anion directed one-dimensional anion-assisted helical chain with active participation of the chloride ion and protonated pyrazole via N–H···Cl hydrogen bonding in Salt-2. In addition, the protonated HL 2 molecules interacted with each other through weak C–H···π interactions resulting in the formation of another one-dimensional helical chain.

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Acknowledgments

This study was supported by the important Foundation of the Educational Commission of Hubei Province, the People’s Republic of China (No. Q200822002) and the Postgraduate Program of Hubei Normal University (2008D53).

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Authors and Affiliations

  1. Hubei Key Laboratory of Pollutant Analysis & Reuse Technology, College of Chemistry and Environmental Engineering, Hubei Normal University, No. 82 Cihu Road, Huangshi, 435002, People’s Republic of China

    Chun-yang Zheng, Dun-jia Wang, Ling Fan & Jing Zheng

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  1. Chun-yang Zheng
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  2. Dun-jia Wang
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  3. Ling Fan
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  4. Jing Zheng
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Correspondence to Chun-yang Zheng.

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Zheng, Cy., Wang, Dj., Fan, L. et al. Anion-directed organized assemblies of protonated pyrazole-based ionic salts. Struct Chem 24, 705–711 (2013). https://doi.org/10.1007/s11224-012-0122-z

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  • DOI: https://doi.org/10.1007/s11224-012-0122-z

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