Abstract
Bis-[2-(3,4-dihydroxyphenyl)-4,5-diphenyl-1H-imidazol-3-ium] Oxalate ethanol solvate crystal has been isolated from slow solvent evaporation method and the structure was characterized by FT-IR, NMR and Single crystal XRD. The compound crystallizes in the triclinic space group P \(\overline{1 }\) with a = 7.7925(16), b = 10.716(3), c = 13.952(3), α = 106.545(5), β = 97.514(5), γ = 110.152(5), V = 1014.0(4) Å3 and Z = 1. The single crystal X-ray data of the compound confirms two proton transfers from an oxalic acid to the pyrimidine-type-nitrogen of two separate imidazole rings. The structure and symmetry of the Imidazolium Oxalate is dictated by N–H⋯O and O–H⋯O hydrogen bonding interactions and are confirmed by hydrogen bonding analysis and hirshfeld surface analysis. The partial double bond character in the imidazolium ring confirms delocalization across the molecular framework. The partial double bond character of the C–O bonds also confirms delocalization in the oxalate anion. The crystal is 3-dimensional structure, with crystal growth in all the crystallographic axis. Computational analysis [DFT, B3LYP/6-311G(d,p)] reveals close correlation of the constrained optimized structure with the experimental data.
Graphical Abstract
Imidazolium oxalate crystal form by the protonation of Imidazole compound and complex formation with oxalate ion.
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Data Availability
The authors confirm that the data supporting the findings of this study are available in the supplementary materials and crystal data is available in CCDC. (https://www.ccdc.cam.ac.uk/structures/Search?access=referee&ccdc=2245593&Author=Peter+solo).
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Acknowledgements
The authors are grateful to St. Joseph’s College (A) Jakhama, for providing all the facilities to perform the research work. The authors also acknowledge SAIC, Tezpur University, for the high-quality single crystal XRD data collection.
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Peter Solo: conceptualization, original draft, writing, software, validation, investigation. M. Arockia doss: methodology, supervision, review and editing.
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Solo, P., Arockia doss, M. Synthesis, Crystal Structure, Hirshfeld Surface and Computational Analysis of Bis-[2-(3,4-dihydroxyphenyl)-4,5-diphenyl-1H-imidazol-3-ium] Oxalate Ethanol Solvate. J Chem Crystallogr (2024). https://doi.org/10.1007/s10870-024-01016-3
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DOI: https://doi.org/10.1007/s10870-024-01016-3