Abstract
2,3-Dimethylpyrazine and 1,2-bis(4-pyridyl)ethane are both N-containing aromatic heterocyclics with two N atoms approximately in the para position. We here report two compounds derived from these heterocyclics (compounds 1 and 2). Compounds 1 and 2 both form a 1:1 2,3-dimethylpyrazine:perchloric acid (PA) and 1,2-bis(4-pyridyl)ethane:PA cocrystal, respectively. Their crystal structures were characterized by single-crystal X-ray diffraction, which revealed that the C–H⋯O and N–H⋯O hydrogen bonding interactions were found to stabilize the crystal structure in compounds 1 and 2. However, PA plays a necessary role for the one-dimensional structure in 1 and the three-dimensional structure in 2. Hirshfeld surfaces and fingerprint plots were applied to get the same conclusion.
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Acknowledgments
We are highly grateful to the financial support from the National Natural Science Foundation of China (No. 21241009, No. 21371031), and the 2014 College Graduate Innovation Projects in Jiangsu Province (No. SJLX_0089).
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Ling, Y., Wang, W., Yang, LJ. et al. The influence of perchloric acid on 2,3-dimethylpyrazine and 1,2-bis(4-pyridyl)ethane: crystal structure and Hirshfeld surfaces analysis. Res Chem Intermed 42, 673–685 (2016). https://doi.org/10.1007/s11164-015-2049-7
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DOI: https://doi.org/10.1007/s11164-015-2049-7