38377-09-2Relevant academic research and scientific papers
Studies on complexes of VO(II), Mn(II), Cu(II), Ni(II), Co(II), Zn(II), Fe(III), and UO2(II) with hydrazone β-diketone ligands
Abdel-Moez, Mohamed S.,Stefan, Shaker L.,El-Bahairy, Mostafa M.,Mashely, Mohamed M.,El-Shetary, Basheir A.
, p. 774 - 781 (2007/10/02)
The stepwise stability constants of VO(II), Mn(II), Cu(II), Ni(II), Co(II), Zn(II), Fe(III), and UO2(II) metal ions with 2-(2-acetylphenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dione (2-APHDm), 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA), 2-(2-acetylphenylhydrazone)-1-phenyl-1,3-butane dione (2-APHB), 2-(2-acetylphenylhydrazone)-1,3-diphenyl-1,3-propane dione (2-APHDB), and 3-(2-acetylphenylhydrazone)-1,1,1-trifluoropentane-2,4-dione (2-APHTA) were determined at 30 deg C by pH titrations in 75percent (v/v) dioxane-water solvent.In addition, metal complexes of three related β-diketones, 2-APHA, 2-APHB, and 2-APHDB have been synthesized and characterized by elemental analysis, uv-visible, ir spectra, and conductance in DMF and magnetic susceptibility measurements.The structure of the complexes have been proposed.Key words: transition metal complexes of hydrazone-β-diketone ligands.
FORMATION CONSTANTS OF TRIVALENT LANTHANIDE METAL IONS AND HYDRAZONE β-DIKETONES IN 75percent DIOXANE - WATER SOLVENT
El-Shetary, Bashiera A.,Stefan, Shaker L.,Abdel-Moez, Mohamed S.,Mashaly, Mahmoud M.
, p. 2362 - 2366 (2007/10/02)
A new series of hydrazone β-diketone organic ligands were prepared: 3-(2-acetylphenylhydrazone)pentane-2,4-dione (2-APHA), 2-(2-acetylphenylhydrazone)-1-phenyl-1,3-butane dione (2-APHB), 2-(2-acetylphenylhydrazone)-1,3-diphenyl-1,3-propane dione (2-APHDB), 3-(2-acetylphenylhydrazone) 1,1,1-trifluoropentane-2,4-dione (2-APHTA) and 2-(2-acetylphenylhydrazone)-5,5-dimethyl-1,3-cyclohexane dion (2-APHDm).The step formation constants of their 1:1 and 1:2 rare-earth complexes were determined at 30 deg C by titration in 75percent (v/v) dioxane-water solvent.The ionization constat of ligands were also measured.A curious odd-even stability differential was apparent in the (2-APHDm) ligand with the heavier rare earth Gd-Lu.The differential was apparent in both log K1 and log β values and may be sufficient to cause reversal of the usual ion-exchange elution sequence.
