Category: 1691-93-6

Jensen, Bror Skytte published the artcileSynthesis of 1-phenyl-3-methyl-4-acyl-5-pyrazolones, Name: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is .

cf. CA 56, 6718d. Condensations of acid chlorides and anhydrides with 1-phenyl-3-methyl-5-pyrazolone in dioxane, catalyzed by suspended Ca(OH)2, give directly and in good yield the following 4-acyl-l-phenyl-3-methyl-5-pyrazolone analogs, which are promising chelating agents for the extraction of metal ions (acyl group, m.p., and % yield given): Ac, 58° (MeOH-H2O), 56; EtCO, 62° (MeOH-H2O), 50; ClCH2CO, 88° (MeOH-H2O) (enol m. 140°), 73; PrCO, 80° (MeOH-H2O), 57; EtOCO, 122° (MeOH-H2O) (enol m. 72°), 46; p-BrC6H4CO, 167° (dioxane-H2O) (enol m. 122°), 82; p-O2NC6H4CO, 200° (dioxane-H20), 79; and F3CCO, 144° (EtOH-H2O) (enol m. 132°), 78. Also prepared is 50% 1-(p-nitrophenyl)-3-methyl-4-benzoyl-5-pyrazolone, m. 174° (keto), 224° (enol) (dioxane-H2O). The method fails to give a product capable of metal extraction with pivalyl chloride. The acid strength of the 4-acylpyrazolones is of the same magnitude as that of carboxylic acids (pK 3-5). Their mol. weights are determined by titration in H2O-alc. with phenolphthalein indicator.

Acta Chemica Scandinavica published new progress in CAplus about 1691-93-6, 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Name: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Jensen, Bror Skytte published the artcileSolvent extraction of metal chelates. II. 1-Phenyl-3-methyl-4-acyl-5-pyrazolones, Synthetic Route of 1691-93-6, the main research area is .

cf. ibid. 1668; CA 56, 6718d. A comparison of the apparent mean complexity constants of various 1-phenyl-3-methyl-4-acyl-5-pyrazolones with Be++, Mn++, Zn++, Pb++, UO2++, La+++, and Th4+ in a CHCl3-H2O system shows a linear relation between the log of the distribution coefficient of an uncharged metal chelate and the log of the distribution coefficient of the un dissociated chelating agent, the slope of the line being characteristic of the metal ion. As expected, an increase of the aliphatic side-chain increases the lipophilic character of the chelating agent, and hence increases its distribution coefficient between organic phase and H2O. In the titration experiments, the chelating agents and the metal salts were 0.05 and 0.005M, resp.; when the media become alk. the metals forming slightly soluble hydroxides often precipitate out. Although some acetyl pyrazolones are inferior to, and others superior to, thenoyltrifluoroacetone (I), the caproylpyrazolone offers better separation than I for the above metal ions. As the capacity of the systems involved are rather large, and the separation adequate for many purposes, these compounds show promise as extractive chelating agents for anal. and radiochem. work.

Acta Chemica Scandinavica published new progress in CAplus about 1691-93-6, 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Synthetic Route of 1691-93-6.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Uzoukwu, B. A. published the artcile1-Phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone (HPMTFP) as an extraction and spectrophotometric reagent for vanadium (V), Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is vanadium determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent vanadium determination.

A rapid and efficient method for the determination of a large quantity of V(V) in an aqueous medium using HPMTFP is described. The percentage extraction as a function of pH of aqueous medium is reported and quant. extraction of V(V) occurs in the pH range of 1.7-2.3. The properties of the color of the extracted complex species with respect to pH of solution, various solvents, time and presence of diverse ions are reported. Beer’s law is valid up to 100 ppm of V (V) (ε = 1.1 × 102 L mol-1 cm-1).

Journal of the National Science Council of Sri Lanka published new progress about vanadium determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent vanadium determination. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Mundra, S. K. published the artcileSynergistic extraction of uranyl ion with acylpyrazolones and dicyclohexano-18-crown-6, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is uranyl extraction acylpyrazolone crown synergism.

Synergistic extraction of UO22+ ion with acylpyrazolones such as 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (HPMTFP, pKa = 2.7), 1-phenyl-3-methyl-4-acetylpyrazolone-5 (HPMAP, pKa = 3.8), or 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (HPMBP, pKa = 4.2) in combination with dicyclohexano-18-crown-6 (DC-18-C6) was studied at various temperatures The results indicate that the equilibrium constants of the organic phase addition reaction, log Ks, at 30° are almost constant (2.72, 2.69, 2.84, resp., for the above 3 systems). The similarity and low log Ks values with DC-18-C6 as compared with TBP systems with these pyrazolones appears to arise due to the limitation to the approach of the large crown ether mol. in bonding with the uranyl chelate. This is in contrast to the fact that the relative basicities of the 2 donors (equilibrium constant for HNO3 uptake) are comparable. Thermodn. data for chelate extraction with HPMTFP evaluated by the temperature coefficient method indicates that a hydrated chelate is extracted into the organic phase. Also, the organic phase addition reaction with DC-18-C6 is stabilized by exothermic enthalpy change, the entropy change counteracting in all the 3 cases.

Journal of Radioanalytical and Nuclear Chemistry published new progress about uranyl extraction acylpyrazolone crown synergism. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Mao, Jiajun published the artcileSome observations on the synergistic extraction of uranium(VI) with double chelating agent systems, Synthetic Route of 1691-93-6, the main research area is uranium extraction synergism; phenylmethylbenzoglypyrazolone thenoyltrifluoroacetone extraction uranium.

The synergistic extraction was studied of VI) from HNO3 media with double-chelating agent systems 1-phenyl-3-methyl-4-benzoyl-pyrazolone-5 (PMBP) plus thenoyltrifluoroacetone (TTA), and PMBP plus 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (PMTFP). Some synergistic effects were observed The composition of synergistic complex species is probably UO2PMBP.TTA and UO2PMBP.PMTFP, resp. The equilibrium constants for these synergistic extractions are calculated by 3 methods and the mechanism and the regularity of extraction are discussed as well.

Journal of Radioanalytical and Nuclear Chemistry published new progress about uranium extraction synergism; phenylmethylbenzoglypyrazolone thenoyltrifluoroacetone extraction uranium. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Synthetic Route of 1691-93-6.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Mao, Jiajun published the artcileSynergistic extraction of uranium(VI) with 1-phenyl-3-methyl-4-acylpyrazolone-5 and neutral extractants, Computed Properties of 1691-93-6, the main research area is uranium extraction phenylmethylacetylpyrazolone neutral extractant; dioctylsulfoxide pyrazolone extraction uranium; TOPO pyrazolone extraction uranium; TBP pyrazolone extraction uranium.

The synergistic extraction of uranium(VI) from hydrochloric acid solution with five chelating agents: 1-phenyl-3-methyl-4-benzoylpyrazolone-5 (PMBP), 1-phenyl-3-methyl-4-acetylpyrazolone-5 (PMAP), 1-phenyl-3-methyl-4-(2′-chlorobenzoyl)pyrazolone-5 (PMCBP), 1-phenyl-3-methyl-4-(p-nitrobenzoyl)pyrazolone-5 (PMNBP) and 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (PMTFP) plus the neutral extractants TBP, dioctyl sulfoxide (DOSO) and TOPO in chloroform were investigated. The extraction coefficients were greater for such mixtures than the individual component. The formulas of the extracted species were determined to be UO2A2B (where HA = chelating agent, B = neutral extractant). Extraction power of these chelating agents increases as follows: PMCBP > PMNBP > PMTFP = PMBP > PMAP. Synergistic extraction power of the neutral extractants increases as follows: TOPO > DOSO > TBP. The extraction equilibrium constants were calculated The mechanism of the synergistic extraction and possible structure of the extracted species are discussed.

Journal of Radioanalytical and Nuclear Chemistry published new progress about uranium extraction phenylmethylacetylpyrazolone neutral extractant; dioctylsulfoxide pyrazolone extraction uranium; TOPO pyrazolone extraction uranium; TBP pyrazolone extraction uranium. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Computed Properties of 1691-93-6.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Cheema, M. N. published the artcileSynergic effect of triphenylphosphine oxide (TPPO) on the extraction of Hg(II), Se(IV), Co(II) and Mn(II) with fluorinated pyrazolone (HPMTFP), Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is metal extraction triphenylphosphine oxide HPMTFP; cobalt extraction triphenylphosphine oxide HPMTFP; mercury extraction triphenylphosphine oxide HPMTFP; manganese extraction triphenylphosphine oxide HPMTFP; selenium extraction triphenylphosphine oxide HPMTFP.

Extraction of Hg(II) Se(IV), Mn(II) and Co(II) has been carried out with 1-phenyl-3-methyl-4-trifluoroacetyl-2-pyrazolin-5-one (HPMTFP) and triphenylphosphine oxide (TPPO) in chloroform at pH 1-10. Quant. extraction of Hg(II), Mn(II) and Co(II) at pH 4 with equimolar 0.05 M (PMTFP + TPPO) in chloroform was observed Se(IV) remains unextracted at this pH range. The stoichiometric composition of the extracted complexes M(PMTFP)2·nH2O (M = Mn, Hg), M(PMTFP)2·2TPPO (M = Mn and Co) and Co(PMTFP)2·TPPO · H2O at less than 0.1M TPPO has been established. The formation constants Km,0 and Km,n and stability constants βm,n have been computed. The anal. method developed was applied to the IAEA standard reference material potato fluor V-4 for the determination of these elements using neutron activation technique.

Journal of Radioanalytical and Nuclear Chemistry published new progress about metal extraction triphenylphosphine oxide HPMTFP; cobalt extraction triphenylphosphine oxide HPMTFP; mercury extraction triphenylphosphine oxide HPMTFP; manganese extraction triphenylphosphine oxide HPMTFP; selenium extraction triphenylphosphine oxide HPMTFP. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Umetani, Shigeo published the artcileSolvent extraction of lithium and sodium with 4-benzoyl or 4-perfluoroacyl-5-pyrazolone and TOPO, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is lithium extraction perfluoroacylpyrazolone; sodium extraction benzoylpyrazolone TOPO; pyrazolone acyl TOPO extraction alkali.

The synergic solvent extraction of Li+ and Na+ into C6H6 or cyclohexane with 4-benzoyl- or 4-perfluoroacyl-5-pyrazolone and trioctylphosphine oxide (TOPO) was studied. Quant. extraction (>99%) of Li+, which is one of the most poorly extractable metal ions, can be achieved with 1-tolyl-3-methyl-4-perfluoroacyl-5-pyrazolone and TOPO. The extraction of Na+ is somewhat poorer than that of Li+ under the same conditions. The perfluoroacyl group at the 4-position of the pyrazolone ring enhances the extraction and increases the maximum percentage extracted Cyclohexane is found to be suitable for a quant. extraction as an organic phase when the reagents are soluble in it. Improved separation of Li+ and Na+ can be attained when they are extracted into C6H6.

Talanta published new progress about lithium extraction perfluoroacylpyrazolone; sodium extraction benzoylpyrazolone TOPO; pyrazolone acyl TOPO extraction alkali. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Uzoukwu, B. A. published the artcile1-Phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 as an extraction and spectrophotometric reagent for iron(III), Application In Synthesis of 1691-93-6, the main research area is iron determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent iron determination.

A rapid, simple and sensitive extraction method for the determination of Fe (III) spectrophotometrically in buffer solutions using 1-phenyl-3-methyl-4-trifluoroacetylpyrazolone-5 (HPMTFP) is described. The properties of the color of the extracted complex species with respect to pH of aqueous media, presence of synergists, various solvents, time and diverse ions are reported. Up to 500 ppm of Ag+, K+, Na+, Ba2+, Be2+, Ca2+, Cd2+, Co2+, Mg2+, Mn2+, Ni2+, Pb2+, Sr2+ and Zn2+ do not interfere. The tolerance level of the following ions which interfere were determined (ppm): Cu2+ â‰?20, Ce4+ â‰?8, Cr6+ â‰?100, Mo6+ â‰?8, U6+ â‰?50, V4+ â‰?300, V5+ â‰?20 and W6+ â‰?8. Beer’s law is valid up to 10 ppm Fe (III) (ε, 7.32 ± 0.08 × 103 L mol-1 cm-1) within an optimum pH range of 1.5-4.5.

Journal of the National Science Council of Sri Lanka published new progress about iron determination extraction spectrophotometry; phenylmethyltrifluoroacetylpyrazolone reagent iron determination. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Application In Synthesis of 1691-93-6.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics

Hasany, Syed Moosa published the artcileExtractive separation and preconcentration of divalent copper from aqueous media, Related Products of pyrazoles-derivatives, the main research area is copper preconcentration extraction; phenylmethyltrifluoroacetylpyrazolone extraction copper; pyrazolone extraction copper.

The extraction off Cu(II) with 1-phenyl-3-methyl-4-trifluoro-acetyl-5-pyrazolone (FAP) in CHCl3 was studied. Complete extraction of the metal was achieved from pH 4-6 buffers. The extractability of other elements was examined under the optimal conditions selected from Cu extraction to check the selectivity. Extracted Cu can be stripped quant. into aqueous solutions A simple and rapid separation and preconcentration procedure Cu(II) is described for anal. applications.

Radiochimica Acta published new progress about copper preconcentration extraction; phenylmethyltrifluoroacetylpyrazolone extraction copper; pyrazolone extraction copper. 1691-93-6 belongs to class pyrazoles-derivatives, name is 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, and the molecular formula is C12H9F3N2O2, Related Products of pyrazoles-derivatives.

Referemce:
Pyrazole – Wikipedia,
Pyrazoles – an overview | ScienceDirect Topics