Oezbey, SueheylaKarayel, ArzuKavak, GueltenSeferoglu, ZeynelErtan, Nermin2024-04-242024-04-2420071472-35811478-4408https://doi.org/10.1111/j.1478-4408.2007.00110.xhttps://hdl.handle.net/11468/17625Two hetarylazo indole dyes were analyzed by single crystal X-ray diffraction. Dye 1, C18H14N4O, crystallises in the monoclinic system, space group P2(1)/c, with two independent molecules in the asymmetric unit. Dye 2, C20H16N4, also crystallises in the monoclinic system, space group P2(1)/c, Z = 4. In both compounds, there are two intramolecular C-H...N hydrogen bonds which influenced the molecular conformation between the azo group and the indole ring system and its phenyl substituent. Each of the independent molecules of dye 1 interact through the N-H...N hydrogen bond, whereas no classical intermolecular hydrogen bond was observed in dye 2. The molecules of dye 1 and dye 2 are packed differently in both structures.eninfo:eu-repo/semantics/closedAccess[No Keyword]Article1236358364WOS:0002511870000042-s2.0-3654904938810.1111/j.1478-4408.2007.00110.xQ2Q2