Category: 1691-93-6

Mundra, S. K. published the artcileSynergistic extraction of uranyl ion with acylpyrazolones and some oxo donors, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is uranyl extraction acylpyrazolone oxo donor; thermodn extraction uranyl acylpyrazolone oxo donor.

Synergistic extraction of uranyl ion with acyl pyrazolones such as 1-phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 (HPMTFP, pKa = 2.7), 1-phenyl-3-methyl-4-acetyl-pyrazolone-5 (HPMAP, pKa = 3.8) in combination with oxo-donors of widely varying basicities, [diphenyl sulfoxide(DPSO), TBP, or TOPO] was studied at various fixed temperatures The results indicate that the equilibrium constants of the organic phase addition reaction (Ks) with these donors follow the order of their basicities (Kh) viz DPSO(0.033) < TBP(0.16) ≪ TOPO(8.9) with their corresponding log Ks values for 3.40, 3.88, 8.05 for HPMTFP system and 3.52, 4.22, 8.04 for HPMAP system. The thermodn. parameters associated with the organic phase addition reaction with these systems were evaluated by the temperature coefficient method. The organic phase addition reaction with TOPO is stabilized both by entropy as well as enthalpy change in both the cases. The high neg. values of enthalpy and low values of entropy for the TBP system may be explained by the addition and not the substitution reaction for the water mols. in the metal chelate. Lanthanide and Actinide Research published new progress about Basicity. 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

Uzoukwu, Bieluonwu Augustus published the artcileSyntheses, structure, UV-visible and IR spectral studies of 1-phenyl-3-methyl-4-acyl-5-pyrazolone complexes with vanadium(V), Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is vanadium oxo acylpyrazolone complex; pyrazolone acyl vanadium oxo complex.

VO2A.HA (HA = 1-phenyl-3-methyl-4-acyl-5-pyrazolone (acyl = acetyl, propionyl, butyryl, valeroyl, caproyl, benzoyl, trifluoroacetyl, trichloroacetyl) were prepared Characterization was by elemental analyses, UV-visible and IR spectral studies. The UV-visible and IR spectral data with the approx. assignments are given and discussed.

Synthesis and Reactivity in Inorganic and Metal-Organic Chemistry published new progress about IR spectra. 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

Cecchini, Martina Maya published the artcileMild catalytic oxidations of unsaturated fatty acid methyl esters (FAMEs) by oxovanadium complexes, Category: pyrazoles-derivatives, the main research area is catalytic oxidation unsaturated fatty acid methyl ester oxovanadium complex.

A selection of unsaturated fatty acid Me esters, namely Me oleate (C18:1), Me linoleate (C18:2) and Me linolenate (C18:3) has been oxidized under mild homogeneous catalytic conditions, using a series of oxovanadium(IV) complexes containing 4-acyl-5-pyrazolone donor ligands with different substituents on acyl residue. The main goal was to evaluate the catalytic role exerted by oxovanadium(IV) metal center, as precursor complex, in the selective oxyfunctionalization of carbon-carbon double bonds of these bio-renewable resources, as a greener alternative to more drastic processes currently used at the industrial level. The three substrates, oxidized using tert-butylhydroperoxide as main oxidant, with or without solvents, showed high conversions of starting materials and high selectivities in the formation of corresponding mono- di- and tri-epoxides, especially under solvent-less conditions. Investigations on a probable catalytic cycle mechanism operative in the tert-butylhydroperoxide oxidation of a simple FAME model substrate, have been performed by means of ESI-MS.

Applied Catalysis, A: General published new progress about Oxidation. 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, Category: pyrazoles-derivatives.

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

Hasany, S. M. published the artcileExtraction and separation of mercury from toxic elements arsenic, cadmium, antimony and thallium, and other metal ions, Computed Properties of 1691-93-6, the main research area is mercury extraction toxic element; arsenic mercury separation; cadmium mercury separation; antimony mercury separation; thallium mercury separation.

Extraction of Hg with 3-methyl-1-phenyl-4-trifluoroacetylpyrazolin-5-one in CHCl3 is described. Maximum extraction (97.3%) and a distribution coefficient (D) of 36.5 are achieved at pH 8. Among the anions tested, thiourea, thiosulfate, and cyanide mask the extraction of Hg. A solution of 0.2M KCN was the most suitable stripping agent for Hg. Decontamination data show that Hg can be separated from toxic elements As, Cd, Sb, and Tl and from other metal ions, i.e., Ga, In, Ge, Sn, Fe Ir, and Pt. A few separations of anal. and radiochem. importance are discussed.

Journal of Radioanalytical and Nuclear Chemistry published new progress about Toxicants. 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

Saeed, M. Mufazzal published the artcileSynergic extraction of Eu(III) with 3-methyl-1-phenyl-4-trifluoroacetyl-2-pyrazolin-5-one (HPMTFP) and tribenzylamine (TBA) from perchlorate media, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is extraction europium fluoroacetylpyrazolinone benzylamine aqueous perchlorate; formation constant europium complex synergic extraction; partition europium extraction fluoroacetylpyrazolinone benzylamine.

Synergic extraction of hydrolyzable lanthanide Eu(III) was studied at low pH range with 0.05 M (HPMTFP + TBA) in CHCl3 from aqueous perchlorate media. The composition of the adduct was established as Eu(PMTFP)3·TBA and Eu(PMTFP)3·2TBA under the conditions of 0.01 M ≥ TBA. The formation constants Ka, Ksyn1, and Ksyn2 and stability constants β1, β2, and K2 of the organic phase reaction were calculated Among the various anions and cations tested, fluoride, oxalate, phosphate, EDTA, Cu(II), and Ti(IV) have drastically reduced the extraction of Eu, whereas oxalate partially reduces the extraction

Radiochimica Acta published new progress about Anions. 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

Sinru, Lin published the artcileAscending water electrode studies of metal extractants 4-acyl-5-pyrazolones and selected tervalent lanthanide ions, Formula: C12H9F3N2O2, the main research area is acylpyrazolone polarog ascending water electrode; water ascending stationary electrode acylpyrazolone; pyrazolone acyl polarog dichloroethane water; phenylmethyltrifluoroacetylpyrazolone polarog dichloroethane water; phenylmethylbenzoylpyrazolone polarog dichloroethane water; lanthanide acylpyrazolone polarog ascending water; complex lanthanide acylpyrazolone polarog.

The polarog. and chhronopotentiometric behavior of the chelating extractants 1-phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone and 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone in the dichloroethane-aqueous systems were characterized at the ascending H2O electrode and the stationary H2O electrode. The nature of the phase transfer processes both in the absence and presence of tervalent lanthanide metal ions was elucidated. Self-adduct and mixed ligand chelate formations were deduced (the latter when trioctylphosphine oxide is present). The reversibility, transfer coefficients, and transfer rate constants of the ligand anions were also deduced. This electrochem. approach is shown to provide novel insights into solvent extraction processes.

Analytical Chemistry published new progress about Electrodes. 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, Formula: C12H9F3N2O2.

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

Umetani, Shigeo published the artcileLiquid-liquid distribution of 4-acyl-3-methyl-1-phenyl-5-pyrazolones and their zinc complexes, Safety of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is acylmethylphenylpyrazolone partition aqueous cyclohexane; zinc acylmethylphenylpyrazolone partition aqueous cyclohexane.

The distribution of 8 4-acyl-3-methyl-1-phenyl-5-pyrazolones and their Zn complexes between aqueous and cyclohexane phases was investigated. The acid dissociation constants and partition constants of the extractants were discussed in terms of a substituent effect. Two series of examined reagents in which one has an aromatic substituent at the 4-position of 5-pyrazolone, and the other an aliphatic one give similar extraction constants Since their acid dissociation constants are essentially the same, a relationship, log PMA = 2 log PHA + constant, is postulated. The extraction constant of a fluorinated reagent which has a considerably small pKa value is also similar to that of the reagents having aliphatic substituents.

Bulletin of the Chemical Society of Japan published new progress about Ionization. 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, Safety of 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 artcileMixed-ligand chelate extraction of lanthanides with 1-phenyl-3-methyl-4-(trifluoroacetyl)-5-pyrazolone and some phosphine oxide compounds, HPLC of Formula: 1691-93-6, the main research area is lanthanide extraction phosphine oxide pyrazolone.

Mixed-ligand chelate extraction was studied for La, Pr, Eu, Ho, and Yb into CHCl3 with 1-phenyl-3-methyl-4-(trifluoroacetyl)-5-pyrazolone (HPMTFP) and with 1 of 3 phosphine oxide compounds (TOPO, octylphenyl(N,N-diisobutylcarbamoylmethyl)phosphine oxide (CMPO), and methylenebis(diphenylphosphine oxide) (MBDPO)). Lanthanide ions are extracted from a 0.1 M NaClO4 as Ln(PMTFP)3(TOPO)2 and Ln(PMTFP)3(CMPO), resp. In the extraction of lanthanides with the mixture of HPMTFP and MBDPO, the extracted species are Ln(PMTFP)3(MBDPO) or Ln(PMTFP)2(ClO4)(MBDPO)2 in the absence or presence of NaClO4, resp. The extraction constants of these systems do not increase monotonically with at. number but have a maximum at Eu or Ho.

Inorganic Chemistry published new progress about Extraction. 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, HPLC of Formula: 1691-93-6.

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

Sujatha, S. published the artcileSynergistic solvent extraction of trivalent lanthanides by mixtures of 1-phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 and neutral oxo-donors, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is extraction synergism lanthanide fluoroacetylpyrazolone sulfoxide; adduct formation extraction lanthanide diketone complex; ethylhexyl sulfoxide adduct lanthanide fluoroacetylpyrazolone complex; phenylphosphine oxide adduct lanthanide fluoroacetylpyrazolone complex.

The synergistic solvent extraction of Nd3+, Eu3+, or Lu3+ by 3-methyl-1-phenyl-4-trifluoroacetyl-5-pyrazolone (HL) in the presence of neutral oxo-donors (D) in CHCl3 was studied by using radioactive tracers. The aqueous Ln3+ ions are present as various forms of chloroacetate complexes. Equilibrium extraction constants were determined for Ln3+ by HL in mixtures containing bis(2-ethylhexyl) sulfoxide (B2EHSO) or Ph3PO. Adduct formation constants were calculated for LnL3.D and LnL3.2D in the CHCl3 phase. Addition of B2EHSO or Ph3PO increases the Lu-Eu separation factor, while B2EHSO addition decreases the Eu-Nd separation factor (but Ph3PO addition causes a moderate increase).

Journal of Chemical Engineering of Japan published new progress about Extraction. 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

Umetani, S. published the artcileAdduct formation properties of some polydentate phosphine oxides in the synergistic extraction of metals with 4-acyl-5-pyrazolone derivatives, Synthetic Route of 1691-93-6, the main research area is extraction transition metal pyrazolone adduct; acrylpyrazolone extraction transition metal synergism; phosphoryl compound extraction synergism pyrazolone.

Some bi- and tridentate phosphine oxide compounds were synthesized and liquid-liquid extraction equilibrium of metal ions with 4-acyl-5-pyrazolone derivatives and the neutral phosphine oxide compounds were investigated. Bis(diphenylphosphinyl)methane was found to be a very powerful ligand in the synergistic extraction of rare earths, alk. earths and the divalent metals such as Co(II), Ni(II), Zn(II) and Cd(II). The composition of the extracted species were determined by a graphical method. The adduct formation constants between the acylpyrazolone chelates and the neutral ligands were determined and discussed in terms of the mol. structure.

Process Metallurgy published new progress about Extraction. 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