Tag: M.W=250-300

Mathur, J. N. published the artcileThermodynamics of americium(3+)-substituted pyrazolone-crown ether adducts, COA of Formula: C12H9F3N2O2, the main research area is americium pyrazolone crown ether adduct.

The thermodn. parameters for the extraction of Am3+ with pyrazolones (HA = HPMBP or HPMTFP) alone as well as their mixtures with one of the crown ethers B15C5 or DCH18C6 were calculated in chloroform at 30° by using the temperature coefficient method. The self-adduct species Am(A)3.HA is enthalpy stabilized. The adduct species Am(A)3.HA.DCH18C6 are stabilized by entropy and opposed by enthalpy. The adduct species Am(A)3.HA.B15C5 (HA = HPMBP) and Am(A)3.B15C5 or Am(A)3.2B15C5 (HA = HPMTFP) are stabilized by enthalpy. These data were correlated with the difference in the nature of binding of the two crown ethers with Am3+.

Solvent Extraction and Ion Exchange published new progress about Complexation enthalpy. 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

Marchetti, F. published the artcileInfluence of sterically demanding groups on the structure and stability in the solid and solution state of (acylpyrazolonate)bis(phosphine)copper(I) derivatives, HPLC of Formula: 1691-93-6, the main research area is crystal structure copper acylpyrazolonato phosphine complex; copper acylpyrazolonate phosphine preparation structure reaction; pyrazolonate acyl copper phosphine preparation structure.

New neutral derivatives [Cu(L)(PR3)2] (LH = 1-phenyl-3-methyl-4-R1(C:O)-pyrazol-5-one, in detail L1H, R1 = C6H5; L2H, R1 = CH3; L3H, R1 = CF3; L4H, R1 = C6H11; L5H, R1 = C6H5CH2; L6H, R1 = Ph2CH; R = C6H5, p-CH3C6H4, C6H5CH2 or C6H11) and [Cu(L)2] (L = L4, L5 and L6) were synthesized and characterized by anal. and spectroscopic techniques. The x-ray crystal and mol. structures of [Cu(L1)(PCy3)2], [Cu(L5)(PPh3)2] and [Cu(L6)(PPh3)2] were resolved, in which the copper atom is found in a strongly distorted tetrahedral CuO2P2 environment. The interbond angles P-Cu-P, P-Cu-O and O-Cu-O are strongly influenced by the steric properties of PR3 and also to a lesser degree by the 4-acyl moiety of the L donor. [Cu(L)(PR3)2] undergo partial dissociation in chloroform solution through breaking of Cu-P and, when R = Cy, also of Cu-O bonds. [Cu(L4)(PPh3)2] reacts with 1-methylimidazoline-2-thione (Hmimt), with 1,10-phenanthroline (Phen), with 2,9-dimethyl-1,10-phenanthroline (Cupr) and with bis(diphenylphosphino)propane (DPPP), yielding the mixed-ligand compounds [Cu(PPh3)(Hmimt)3](L4), [Cu(L4)(PPh3)(Phen)], [Cu(Cupr)2](L4) and [Cu(DPPP)2](L4), resp.

Inorganica Chimica Acta published new progress about Bond angle, dihedral. 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

Okafor, Emmanuel Chukwuemeka published the artcileThe metal complexes of heterocyclic β-diketones and their derivatives. IX. Lanthanon chelates of 3-methyl-1-phenyl-4-trifluoroacetylpyrazol-5-one (HPMTFP). Proton, carbon-13, and fluorine-19 NMR, IR, and UV-visible spectral studies, Application of 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is UV spectra pyrazolone lanthanide complex; pyrazolone lanthanide complex NMR.

Lanthanon chelates of 3-methyl-1-phenyl-4-trifluoroacetylpyrazol-5-one (LH) were synthesized and investigated. Characterization was by elemental anal., conductivity measurements, Karl Fischer titrations, and IR and 1H NMR spectra. The complexes were neutral chelates with the empirical formula M(L)3.xH2O.yEtOH where for M = La, Nd, Eu, Dy, Er, Pr, and Lu, x = 2 and y = 0, whereas for M = Y and Gd, x = 2 and y = 0.5. 1H, 13C, and 19F NMR, IR, and UV-visible spectral results together with assignments are presented. The parameters of S. P. Sinha (1966) were calculated and discussed for Nd and Er.

Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy published new progress about Bathochromic effect. 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, Shigeo published the artcileSolvent extraction of alkaline earth metals, and lithium with 1-phenyl-3-methyl-4-acylpyrazol-5-ones and trioctylphosphine oxide, Recommanded Product: 5-Methyl-2-phenyl-4-(2,2,2-trifluoroacetyl)-1H-pyrazol-3(2H)-one, the main research area is alk earth extraction phenylmethylacylpyrazolone; pyrazolone derivative extraction alk earth; octylphosphine oxide extraction alk earth; lithium extraction pyrazolone derivative.

The synergic extraction of Mg, Ca, Sr, Ba, and Li into cyclohexane or benzene containing 1-phenyl-3-methyl-4-acyl-pyrazol-5-one (HA) [acyl = benzoyl or trifluoroacetyl] and tri-n-octylphosphine oxide (TOPO) was investigated as a function of pH, HA and TOPO concentrations The extracted species when the 4-benzoyl compound was used, were MA2(TOPO)2 (M = Mg, Ca, Sr), BaA2(TOPO)3 and LiA(TOPO)2. When the 4-trifluoroacetyl derivatives was used, the extracted species were the same except for SrA2(TOPO)3. Extraction constants for the synergic extractions were calculated

Analytica Chimica Acta published new progress about Alkaline earth metals Role: PRP (Properties). 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

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

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

Ghani, Lubna published the artcileLiquid-liquid extraction of Eu(lll) using synergic mixture of 1-phenyl-3-methyl-4-trifluoroacetyl-2-pyrazolin-5-one and crown ethers, Quality Control of 1691-93-6, the main research area is europium HPMTFP crown ether liquid extraction.

Synergic extraction of Eu(III) as representative of rare earth elements was conducted with 0.01 mol dm-3 of trifluoroacetyl-pyrazolin-5-one (HPMTFP) and then with synergic mixture of HPMTFP and crown ethers (benzo-15-crown-5, 18-crown-6, 15-crown-5) in dichloromethane (DCM) from aqueous solution having pH 1.0-3.5. Slope anal. method was used for determining the composition of the synergic adduct i.e. Eu(PMTFP)3 that came out to be Eu(PMTFP)3·2S, where S = neutral oxo-donor and -PMTFP = conjugate base of HPMTFP mol. Selective extraction of Eu(III) was found in the presence of various masking agents like citrate, oxalate, bromide, thiosulfate, chromate ions and of some cations. The accuracy of the developed procedure was checked by analyzing real lake sample (IAEA-SL-3) as a reference material.

SN Applied Sciences published new progress about Actinides Role: TEM (Technical or Engineered Material Use), USES (Uses). 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, Quality Control of 1691-93-6.

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

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

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