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Synthesis and Crystal Structure of a New Hydrated Benzimidazolium Salt Containing Spiro Structure

MicroScale Science Institute, Department of Chemistry, Chemical Engineering and Environmental Engineering, Weifang University, Weifang 261061, China
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Academic Editor: Shujun Zhang
Crystals 2017, 7(10), 303; https://doi.org/10.3390/cryst7100303
Received: 23 August 2017 / Revised: 29 September 2017 / Accepted: 29 September 2017 / Published: 9 October 2017
A new hydrated benzimidazolium salt containing spiro structure was obtained when benzimidazole is added to ethyl alcohol of 1,5-dioxaspiro[5.5]undecane-2,4-dione and trimethoxymethane. The title compound (C19H21O8) (C7H7N2) (0.5H2O) was characterized by elemental analysis, IR, UV-Vis, and single-crystal X-ray diffraction. The result shows that it belongs to the triclinic system, space group P-1, with a = 11.017(2) Å, b = 11.424(2) Å, c = 11.650(2) Å, α = 70.60(3)°, β = 71.00(3)°, γ = 67.64(3)°, Mr = 505.51, V = 1245.2(5) Å, Z = 2, Dc = 1.348 g/cm3, F(000) = 534, μ(MoKa) = 0.102 mm−1. There exist two types of hydrogen bonds in the crystal. (C19H21O8) anions and (C7H7N2)+ cations are linked by N–H···O hydrogen bonds, while (C19H21O8) anions and free water are linked by O–H···O hydrogen bonds. All of the above hydrogen bonds form a one-dimensional (1D)-chained structure. The 1D chains further links the molecule into a three-dimensional (3D)-layered structure. View Full-Text
Keywords: synthesis; crystal structure; benzimidazolium synthesis; crystal structure; benzimidazolium
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Zeng, W.; Jiang, J. Synthesis and Crystal Structure of a New Hydrated Benzimidazolium Salt Containing Spiro Structure. Crystals 2017, 7, 303.

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