Abstract
A new organic reagent based on benzoylacetone, 3-(4'-fluorophenylimine) -1 –phenylbutanone – 1 was synthesized and its crystal structure determined by X-ray structural analysis. Reagent crystals are monoclinic: a=6.4520(6) Ǻ, b=28.685(2) Ǻ, c=7.2003(6) Ǻ, α=90°, β=91.163(2)°, γ=90°, V=1332.3(2)Å 3, space group P21/n, Z=4. Results of X-ray diffraction analysis showed that the reagent molecule in the crystal has trans-configuration. The reagent dissociation constant (pK = 9.89 ± 0.05) and the stability constants of its complexes with some metals were determined by means of potentiometric titration.method The complexation of the reagent with iron (III) in the presence of dianthipirilmethane and its homologs – diantipyrylphenylmethane and diantipyryl-o-oxyphenylmethane was studied spectrophotometrically. A highly selective method for the direct determination of iron micro-quantities in red and Hovsani onions developed.