Atioğlu, ZelihaAkkurt, MehmetShikhaliyev, Namiq Q.Mammadova, N. A.Mammadova, Naila A.Babayeva, Gülnara V.Khrustalev, Victor N.Bhattarai, Ajaya2022-07-272022-07-272022https://doi.org/10.1107/S2056989022007113https://hdl.handle.net/20.500.12695/1697A new polymorph of the title compound, C14H8Br3N3O2, (form-2) was obtained in the same manner as the previously reported form-1 [Akkurt et al. (2022[Akkurt, M., Yıldırım, S. Ö., Shikhaliyev, N. Q., Mammadova, N. A., Niyazova, A. A., Khrustalev, V. N. & Bhattarai, A. (2022). Acta Cryst. E78, 732-736.]). Acta Cryst. E78, 732–736]. The structure of the new polymorph is stabilized by a C—H?O hydrogen bond that links mol­ecules into chains. These chains are linked by face-to-face ?–? stacking inter­actions, resulting in a layered structure. Short inter-mol­ecular Br?O contacts and van der Waals inter­actions between the layers aid in the cohesion of the crystal packing. In the previously reported form-1, C—H?Br inter­actions connect mol­ecules into zigzag chains, which are linked by C—Br?? inter­actions into layers, whereas the van der Waals inter­actions between the layers stabilize the crystal packing of form-2. Hirshfeld mol­ecular surface analysis was used to compare the inter­molecular inter­actions of the polymorphs.eninfo:eu-repo/semantics/openAccesscrystal structureazo compoundspolymorphismC—HO interactionsHirshfeld surface analysisArticle