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The title Schiff base compound, C19H19N3O3, a derivative of antipyrine, has been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group C2/c, with a = 27.935(5), b = 7.553(1), c = 16.692(3) , β = 105.810(3)o, Z = 8, V = 3388.7(10) 3, Dc = 1.323 g/cm3, Mr = 337.37, λ(MoKα) = 0.71073 , μ = 0.091 mm-1, F(000) = 1424, R = 0.0630 and wR = 0.1273. A total of 3513 unique reflections were collected, of which 2112 with I > 2σ(I) were observed. The molecular structure adopts a trans configuration about the C=N double bond. The pyrazoline and C(1)～C(6) phenyl ring are approximately coplanar (mean deviation from the combined plane is 0.069(3) ), with the dihedral angle of 9.7(2)o. The preliminary biological tests show that the compound has high antibacterial activities.
The title Schiff base compound, C19H19N3O3, a derivative of antipyrine, has been synthesized and characterized by elemental analysis, IR, and single-crystal X-ray diffraction. The crystal belongs to the monoclinic system, space group C2 / c, with a = 27.935 (5) b = 7.553 (1) c = 16.692 (3) β = 105.810 (3) o Z = 8 V = 3388.7 (10) 3 Dc = 1.323 g / cm3 Mr = 337.37, A total of 3513 unique reflections were collected, of which 2112 with I> 2σ (I) were observed at λ (MoKα) = 0.71073, μ = 0.091 mm -1, F (000) = 1424, R = 0.0630 and wR = . The molecular structure of a trans configuration about the C = N double bond. The pyrazoline and C (1) ~ C (6) phenyl rings are approximately coplanar (mean deviation from the combined plane is 0.069 (3)), with the dihedral angle of 9.7 (2) o. The preliminary biological tests show that the compound has high antibacterial activities.