Abstract
The crystal structure of the title compound, C4H6N2, has been determined using X-ray diffraction at 100 K. The crystal of 2-methylimidazole is in orthorhombic crystal system with space group P212121 (Z = 4), lattice parameters: a = 5.9957(12) Å, b = 8.1574(16) Å and c = 9.7010(19) Å, V = 474.47(16) Å. The molecule of 2-methylimidazole is approximately planar. The maximum deviation from the least-squares imidazole plane, calculated for all non-H atoms is 0.006(2) Å. N–H···N hydrogen bonds link the molecules together, forming infinite chains of hydrogen bond pattern C(4) defined by the graph-set analysis. Two chains, which are almost antiparallel to each other, pass through each unit cell. The dihedral angle between the mean planes of molecules forming these intersecting chains is 76.90(4)°. No evidence was found for disorder of the hydrogen-bonding proton between the atoms N1 and N3. The significance of this study lies in the analysis of the interactions occurring via hydrogen bonds in this structure, as well as, in the comparison drawn between the molecular structure of 2-methylimidazole and those of several of other imidazole derivatives possessing a hydrogen atom in the N1 position.
Index Abstract
The article presents the detailed description of the crystal structure of 2-methylimidazole including the information on the symmetry of the analyzed crystal, the values of the bond distances and the angles as well as hydrogen bond interaction analysis.
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Acknowledgments
The work of the author (B. H) was partially supported by PhD scholarship granted in 2008 within the framework of the ‘University as a Partner of the Economy Based on Science’ (UPGOW) project, subsidized by the European Social Fund (EFS) of the European Union. The authors are very grateful to Doctor hab. Roman Wrzalik from University of Silesia, Institute of Physics, for Raman spectra measurement of 2-methylimidazole sample.
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Hachuła, B., Nowak, M. & Kusz, J. Crystal and Molecular Structure Analysis of 2-Methylimidazole. J Chem Crystallogr 40, 201–206 (2010). https://doi.org/10.1007/s10870-009-9634-9
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DOI: https://doi.org/10.1007/s10870-009-9634-9