Category: 1691-93-6

Fujino, O. published the artcileDetermination of uranium and thorium in apatite minerals by inductively coupled plasma atomic emission spectrometry with solvent extraction separation into diisobutyl ketone, Application In Synthesis of 1691-93-6, the main research area is uranium thorium determination apatite ICP AES.

Determination of the actinide elements (U and Th) in apatite minerals was examined by inductively coupled plasma at. emission spectrometry (ICP-AES) with solvent extraction separation The spectral interference by Ca in the apatite and the neg. interference by the macro-component (Ca phosphate) occurred simultaneously for U and Th. Therefore, after apatite mineral was treated with hot concentrated HNO3, U and Th were separated from Ca phosphate by the solvent extraction method. 1-Phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone (HPMTFP, pKa=2.56) was used as an extraction reagent. Diisobutyl ketone was selected as the extraction organic solvent. U and Th were quant. extracted over pH 2, and could be separated from the apatite composites. The organic phase was injected directly into the ICP-AES spectrometer. The U and Th contents in apatite minerals from Florida, USA, are 103 ± 2.2 and 8.84 ± 0.19 ppm. These results were quite comparable with those measured with ICP-mass spectrometry (ICP-MS).

Analytica Chimica Acta published new progress about Apatite-group minerals Role: AMX (Analytical Matrix), ANST (Analytical Study). 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

Modi, C. K. published the artcileSome novel tetradentate Schiff base complexes VO(IV) and Cu(II) involving fluorinated heterocyclic β-diketones and polymethylene diamines of varying chain length, Category: pyrazoles-derivatives, the main research area is preparation fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex; thermal decomposition fluoroacetylpyrazolinone alkyldiamine Schiff base transition metal complex.

The present article describes the synthesis, spectral, coordination and thermal aspects of N,N’-polymethylene bis(1-phenyl-3-methyl-4-trifluoroacetylimino-2-pyrazoline-5-ol)oxovanadium(IV) or copper(II) Schiff base complexes with alkyl backbones ranging from two to four carbons were characterized on the basis of elemental anal., magnetic moments, molar conductivity measurements, spectra (FTIR, ESR, UV-Visible, MS), VPO and thermal studies. The vapor pressure osmometry (VPO) and mass spectral studies indicate that the complexes are monomeric. An ESR study of all these complexes of VO(IV) and Cu(II) are consistent with the square pyramidal and square planar geometries of these metal ions, resp. In addition, the kinetics and thermodn. parameters for the different thermal decomposition steps of the complexes were studied employing Horowitz-Metzger and Freemen-Carroll methods.

Journal of Thermal Analysis and Calorimetry published new progress about Thermal decomposition. 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

Uzoukwu, B. A. published the artcileSpectroscopic studies of Th(IV), La(III) and Pb(II) complexes of 4-trifluoroacetyl and 4-trichloroacetyl derivatives of 3-methyl-1-phenylpyrazol-5-one, Product Details of C12H9F3N2O2, the main research area is acetylpyrazolone lanthanum thorium lead complex preparation; lanthanum acetylpyrazolone complex preparation; thorium acetylpyrazolone complex preparation; lead acetylpyrazolone complex preparation.

Th(IV), La(III) and Pb(II) complexes of 4-trifluoroacetyl and 4-trichloroacetyl derivatives of 3-methyl-1-phenylpyrazol-5-one were synthesized and characterized by elemental, UV, IR,1H and 13C NMR spectral studies. Spectral analyses show that the complexes are dehydrated and have the general mol. formula MLn where M(n) = Th(4),La(3) and Pb(2). The analyses further showed that the CO-M bond of metal-trifluoroacetylpyrazolonate complexes are weaker than the metal-trichloroacetylpyrazolonate complexes.

Journal of the National Science Council of Sri Lanka published new progress about. 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, Product Details of C12H9F3N2O2.

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

Uehara, Akihiro published the artcileA new electrochemical method to study the distribution of weak acids at the aqueous|organic solution interface, Safety of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is electrochem method weak acid distribution aqueous organic solution interface; phenylmethylbenzoylpyrazolone distribution aqueous organic solution interface electrochem method; phenylmethyltrifluoroacetylpyrazolone distribution aqueous organic solution interface electrochem method; thenoyltrifluoroacetone distribution aqueous organic solution interface electrochem method; dichloroethane water interface weak acid distribution electrochem method.

The distribution process of a weak acid, HA, between an aqueous and an organic solution, W and O, was assumed to be the transfers of the dissociation products, H+ and A-, between W and O combined with the associations of H+ and A- in W and O. The transfers were considered to proceed depending on Gibbs energies for the transfer of H+ and A- from W to O, ΔGotr,H+ and ΔGotr,A-, and maintaining electroneutrality in both W and O. Then, a theor. equation was derived for quant. expressions of distribution ratios, D, of species relative to HA between W and O at various pH of W by using ΔGotr,H+ and ΔGotr,A- and acid dissociation constants of HA in W and O, Ka,W and Ka,O. The D calculated by substituting Ka,W, Ka,O, ΔGotr,H+ and ΔGotr,A- determined with the aid of electrochem. methods for those in the derived equation agreed well with D determined by the distribution experiments with W of wide pH range. The HA studied were chelating agents such as 1-phenyl-3-methyl-4-benzoyl-5-pyrazolone, 1-phenyl-3-methyl-4-trifluoroacetyl-5-pyrazolone and thenoyltrifluoroacetone.

Journal of Electroanalytical Chemistry published new progress about Electrolysis (controlled potential-difference). 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

Varma, R. Luxmi published the artcileBis(2-ethylhexyl)-N,N-diethylcarbamoylmethyl phosphonate as a synergist in the extraction of trivalent lanthanides by 1-phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5, HPLC of Formula: 1691-93-6, the main research area is synergetic extraction trivalent lanthanide.

Synergism in the extraction of trivalent lanthanides such as Nd, Eu, and Lu was investigated by using mixtures of 1-phenyl-3-methyl-4-trifluoroacetyl-pyrazolone-5 (HPMTFP) and bis(2-ethylhexyl)-N,N-diethylcarbamoylmethyl phosphonate (CMP) in chloroform. Lanthanides are found to be extracted from 0.01 mol/dm3 chloroacette medium with HPMTFP as Ln(PMTFP)3 or Ln(PMTFP)3·CMP in the absence or presence of CMP, resp. The equilibrium constants of these synergistic species do not increase monotonically with at. number but have a maximum at Eu. The addition of a synergist, CMP to the metal chelate system not only enhances the extraction efficiency but also improves the selectivities among these trivalent lanthanides. The IR results indicate that CMP acts as a bidentate ligand in these mixed-ligand systems.

Radiochimica Acta published new progress about. 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

Huang, Chunhui published the artcileLangmuir Film-Forming and Second Harmonic Generation Properties of Lanthanide Complexes, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is LB film lanthanide diketonato hemicyanine; laser radiation generation lanthanide diketonato hemicyanine; lanthanide diketonato hemicyanine preparation lasing film.

Amphiphilic lanthanide complexes were designed and synthesized, in which the lanthanide complex anions act both as the counterions of hemicyanine and as the spacer within a Langmuir-Blodgett (LB) film. Studies on the surface pressure-area (π-A) isotherms of these complexes show that the film-forming properties can be clearly improved if appropriate β-diketone ligands were chosen. The effects of mol. structures of the complexes, including the variation of lanthanide central ions, the structures of β-diketone ligands, and the length of alkyl chains in hemicyanines, on the film-forming properties of the materials are discussed. From 2nd-harmonic generation experiments, the largely enhanced 2nd-order mol. hyperpolarizability of lanthanide complexes with good film-forming properties were obtained compared with the hemicyanine iodide. This effect may be due in part to the local field effect but primarily mol. ordering and ordered segregation of hemicyanine chromophores by the bulky lanthanide complex anions. The charge separation of the hemicyanine chromophores was supported by the crystal structure of a model complex. The homogeneity of the film was verified by low angle x-ray diffraction and also by the linear relation of the absorbance vs. the number of layers of the LB films of a selected complex.

Journal of Physical Chemistry published new progress about Langmuir-Blodgett films. 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

Sita, N. Mahalakshmi published the artcileEquilibrium studies of lanthanide(III) complexes of 1-phenyl-3-methyl-4-benzoyl pyrazolone-5 (PMBP) and 1-phenyl-3-methyl-trifluoroacetyl-pyrazolone-5 (PMTFP), COA of Formula: C12H9F3N2O2, the main research area is rare earth complex PMBP PMTFP stability; pyrazolone benzoyl fluoroacetyl lanthanide complex stability.

The stability constants of [Ln(PMBP)3.NO3] and [Ln(PMTFP)3] complexes have been determined by the potentiometric method and the values obtained practically agree for the whole series of lanthanides for both types of complexes. The “”gadolinium break”” is also evident. Under the same exptl. conditions, the competitive coordination reaction of the ligands with Ca2+ and Na+ have been carried out whose ionic radii are almost the same but their charges are different. The IR spectral studies show that in the PMBP and PMTFP complexes, the ligands are similarly coordinated by the carbonyl oxygen groups. The multiplet pattern of NMR spectra which partially disappears on coordination of the ligands shows a more rigid structure for PMBP than for PMTFP complexes.

Indian Journal of Chemistry, Section A: Inorganic, Bio-inorganic, Physical, Theoretical & Analytical 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, COA of Formula: C12H9F3N2O2.

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