2-[N-(2,4-Difluorophenyl)carbamoyl]-3,4,5,6-tetrafluorobenzoic acid
نویسندگان
چکیده
The title compound, C(14)H(5)F(6)NO(3), was synthesized by condensation of tetra-fluoro-phthalic anhydride and 2,4-difluoro-aniline. It was then recrystallized from hexane to give a nonmerohedral twin with two crystallographically unique mol-ecules in the asymmetric unit. The refined twin fraction is 0.460 (3). Torsional differences between the aryl rings and the central amide group account for the presence of two unique mol-ecules. The compound packs as double tapes formed by O-H⋯O and N-H⋯O hydrogen-bonding inter-actions between each unique mol-ecule and its symmetry equivalents.
منابع مشابه
2-Amino-3,4,5,6-tetrafluorobenzoic acid
The asymmetric unit of the title compound, C(7)H(3)F(4)NO(2), obtained as an inter-mediate in the synthesis of a coupling reagent, contains four independent and conformationally similar mol-ecules. The amine H atoms form both intra-molecular and inter-molecular N-H⋯O(carbox-yl) hydrogen bonds which, together with inter-molecular O-H⋯O(carbox-yl) hydrogen bonds and N-H⋯F associations form ribbon...
متن کامل2-Carbamoyl-3,4,5,6-tetrafluorobenzoic acid
In the title compound, C(8)H(3)F(4)NO(3), the carb-oxy group lies nearly in the plane of the ring with a C-C-C-O torsion angle of -10.5 (4)°. The carbamoyl group is almost perpendic-ular to the benzene ring [C-C-C-O torsion angle = 82.2 (4) °]. In the crystal, molecules are linked via O-H⋯O and N-H⋯O hydrogen bonds involving the carbamoyl and carb-oxy groups.
متن کامل1-{(1Z)-1-[3-(2,4-Dichlorophenoxy)propoxy]-1-(2,4-difluorophenyl)prop-1-en-2-yl}-1H-1,2,4-triazole
In the title compound, C(20)H(17)Cl(2)F(2)N(3)O(2), the triazole ring makes dihedral angles of 28.0 (3) and 72.5 (2)° with the 2,4-dichloro-pheny and 2,4-difluoro-phenyl rings, respectively, and the mol-ecule adopts a Z-conformation about the C=C double bond. In the crystal, C-H⋯O and C-H⋯N hydrogen bonds link the mol-ecules.
متن کامل1-(2,4-Difluorophenyl)-2-(1H-1,2,4-triazol-1-yl)ethanol
In the title compound, C(10)H(9)F(2)N(3)O, the dihedral angle between the mean planes of the triazole and benzene rings is 20.6 (2)°. In the crystal, mol-ecules are linked by strong O-H⋯ N hydrogen bonds into chains with graph-set notation C(9) along [100]. Weak C-H⋯N and C-H⋯F inter-actions are also observed.
متن کامل(Z)-1-(2,4-Difluorophenyl)-3-phenyl-2-(1H-1,2,4-triazol-1-yl)prop-2-en-1-one
In the title mol-ecule, C(17)H(11)F(2)N(3)O, the triazole ring makes dihedral angles of 83.00 (5) and 16.63 (5)°, respectively, with the phenyl and benzene rings. Weak inter-molecular C-H⋯F and C-H⋯N inter-actions contribute to the crystal packing.
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عنوان ژورنال:
دوره 65 شماره
صفحات -
تاریخ انتشار 2009