| Abstract: | The title compounds (Z)-3-(2-(3-chloropyridin-2-yl)hydrazono)indolin-2-one (A) and 7-bromo-(Z)-3-((4-pyridinyl)carboxlichydrazono)-2-indolinone (B) have been synthesized and structurally determined by elemental analysis and single-crystal X-ray diffraction studies.Compound A (C<,13>H<,8>ClN<,4>O) belongs to the orthorhombic crystal system, space group Pca2<,1> with a = 20.799(4), b = 4.9312(10), c = 11.764(2) (A), V= 1206.6(4) (A)<,3>, M<,r> = 271.68, D<,c> = 1.496 g/cm<'3>,μ = 0.313 mm<'-1>, F(000) = 556, Z = 4, the final R = 0.0346 and wR = 0.0831 for 2683 observed reflections with I > 2σ(I).Compound B (C<,14>H<,9>BrN<,4>O<,2>) belongs to the triclinic crystal system, space group P<,1><'-> with a = 6.6834(13), b = 7.0727(14), c= 14.285(3) (A), α = 95.56(3), β = 99.00(3), y = 102.95(3)°, V= 643.8(2) (A)<'3>, Mr = 345.16, D<,c> = 1.780 g/cm<'3>,μ = 3.203 mm<'-1>, F(000) = 344, Z = 2, the final R = 0.0487 and wR = 0.1167 for 2334 observed reflections with I > 2σ(I).The preliminary herbicidal bioassay reveals that compounds A and B have some inhibition both in vivo and in vitro against AHAS. |
