Abstract The title compound, N-phenylpyridin-4-amine, forms two polymorphs I and II which were obtained from acetonitrile or tetrahydrofuran, respectively. The molecular structures in both polymorphs are similar one another. The pyridyl rings show better conjugation with the lone pairs of the nitrogen atom than phenyl rings. In both polymorphs, the molecules also form a similar sheet structure in which they make zigzag hydrogen bonds. Judged by powder XRD analysis, polymorph I was considered to be the most stable phase at room temperature.

中文翻译：

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N-苯基吡啶-4-胺的两种多晶型物

摘要 标题化合物N-苯基吡啶-4-胺形成两种多晶型物I和II，分别从乙腈或四氢呋喃中得到。两种多晶型物的分子结构彼此相似。与苯环相比，吡啶环与氮原子的孤对电子显示出更好的共轭。在这两种多晶型物中，分子也形成类似的片状结构，其中它们形成锯齿形氢键。通过粉末XRD分析判断，多晶型I被认为是室温下最稳定的相。