Solvent Extraction of Metal Chelates. II. An Investigation of some 1-Phenyl-3-methyl-4-acyl-pyrazolones-5.

Studies on the Extraction of Ti(IV), Ce{IV), Th(IV) and U(VI) with 1-Phenyl-3-methyl-4- benzoyl-pyrazole-5-one from Different Mineral Acids. Separation of Thorium from Titanium, Uranium and Rare Earths

“…All the reagents were of AnalaR grade, l-phenyl-3-methyl-4-benzoyl-pyrazole-5-one was synthesised according to the published methods [3,4]. Stock solutions of thorium nitrate and ceric sulphate were prepared and standardised by the Oxalate procedure.…”

Synthesis, spectroscopy (IR, multinuclear NMR, ESI-MS), diffraction, density functional study and in vitro antiproliferative activity of pyrazole-beta-diketone dihalotin(IV) compounds on 5 melanoma cell lines

“…1), a class of intrinsically asymmetric b-diketones that can be fine-tuned by a careful choice of substituents on N1, C3 and C4. Jensen [15] reported the first work on the use of acylpyrazolones as chelating agents. They have been widely used as pigments in dyes [16] and as metal extractants [17].…”

Extraction of Fe(III) and U(VI) with 1-Phenyl-3-methyl-4-acyl-pyrazolones-5 from Aqueous Solutions of Different Acids and Complexing Agents. Separation of Fe(III) from U(VI)

“…The 4-benzoyl derivative HBP has been extensively used for these studies. Some workers have however, used the 4-acetyl [1], 4-capryl [4], 4-butyryl [5], 4-trifluoroacetyl [6,7] and 4-caproyl [8] for similar studies and have reported effective extraction of metal ions from solutions at low pH. Consequently, efforts have been put recently towards extending the range of extraction reagents beyond HBP to other 4-acyl derivatives of pyrazolone, which included those we have fully characterized [9] for use in extraction studies.…”