Category: 67-51-6

Recommanded Product: 67-51-6. In 2020.0 TRANSIT METAL CHEM published article about RHODIUM; LIGANDS; ALKENES in [Gamede, Noluthando V.; Kapfunde, Tsitsi A.; Ocansey, Edward; Ngumbu, Denis M.; Darkwa, James; Makhubela, Banothile C. E.] Univ Johannesburg, Dept Chem, POB 524, ZA-2006 Auckland Pk, South Africa in 2020.0, Cited 21.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6.

The industrial process of hydroformylation or the oxo process has been used for many years in the production of aldehydes from alkenes. Different metals have been used as efficient catalysts for hydroformylation, in which linear and branched aldehydes are the products obtained; therefore, the development of new catalysts for hydroformylation with high selectivity to aldehydes is important. Rhodium complexes 6-9 were synthesized using [RhCl(CO)(2)](2), or [RhCl(COD)](2), with either pyrazolylpyridyl N ‘ N ‘ N pincer ligands or a pyrazolylpyridyl N ‘ N ligand. These complexes were then evaluated as catalyst precursors in the hydroformylation reaction using a variety of alkenes. The catalysts all showed activity in hydroformylation but the most active catalyst was methyl-substituted pyrazolyl-rhodium complex 7 following optimization of temperature, syngas pressure and amount of catalyst. Other olefinic substrates were used for hydroformylation in the presence of 7 under the optimum hydroformylation conditions. Undecene and dodecene as substrates only showed minimal formation of aldehydes with predominantly isomerization of the alkene being observed.

Welcome to talk about 67-51-6, If you have any questions, you can contact Gamede, NV; Kapfunde, TA; Ocansey, E; Ngumbu, DM; Darkwa, J; Makhubela, BCE or send Email.. Recommanded Product: 67-51-6

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An article Emergence of a New [NNN] Pincer Ligand via Si-H Bond Activation and beta-Hydride Abstraction at Tetravalent Cerium WOS:000566723800001 published article about LANTHANIDE COMPLEXES; UNIQUE EMISSION; METAL; CHEMISTRY; SILYLAMIDE; OXIDATION; BEARING; LUMINESCENCE; COORDINATION; EQUILIBRIUM in [Werner, Daniel; Bayer, Uwe; Schaedle, Dorothea; Anwander, Reiner] Univ Tubingen EKUT, Inst Anorgan Chem, Morgenstelle 18, D-72076 Tubingen, Germany in 2020.0, Cited 104.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. Quality Control of 3,5-Dimethyl-1H-pyrazole

The cerium(IV) pyrazolate complexes [Ce(Me(2)pz)(4)](2)and [Ce(Me(2)pz)(4)(thf)] initiate beta-hydride abstraction of the bis(dimethylsilyl)amido moiety, to afford a heteroleptic cerium(IV) species containing a dimethylpyrazolyl-substituted silylamido ligand, namely [Ce(Me(2)pz)(3)(bpsa)] (bpsa=bis((3,5-dimethylpyrazol-1-yl)dimethylsilyl)amido; Me(2)pz =3,5-dimethylpyrazolato), along with some cerium(III) species. Remarkably, the nucleophilic attack of the pyrazolyl at the silicon atom and concomitant Si-H-bond cleavage is restricted to the tetravalent cerium oxidation state and appears to proceed via the formation of a transient cerium(IV) hydride, which engages in immediate redox chemistry. When [Ce(Me(2)pz)(4)](2)is treated with [Li{N(SiMe3)(2)}], that is, in the absence of the SiH functionality, any redox chemistry did not occur. Instead, the ceric ate complex [LiCe2(Me(2)pz)(9)] and the stable mixed-ligand ceric species [Ce(Me(2)pz)(2){N(SiMe3)(2)}(2)] were obtained.

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COA of Formula: C5H8N2. Recently I am researching about CYCLOMETALATED IR(III) COMPLEXES; C-H ACTIVATION; PHOTOPHYSICAL PROPERTIES; LIGANDS; RHODIUM; DESIGN; BIDENTATE; PYRAZOLE; HYDRIDE, Saw an article supported by the Ministry of Science and Technology (MOST)Ministry of Science and Technology, China; Research Grant CouncilHong Kong Research Grants Council; City University of Hong Kong, Hong Kong SARCity University of Hong Kong. Published in AMER CHEMICAL SOC in WASHINGTON ,Authors: Yuan, Y; Gnanasekaran, P; Chen, YW; Lee, GH; Ni, SF; Lee, CS; Chi, Y. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole

Synthesis of the multidentate coordinated chelate N3C-H-2, composed of a linked functional pyridyl pyrazole fragment plus a peripheral phenyl and pyridyl unit, was obtained using a multistep protocol. Preparation of Ir(III) metal complexes bearing a N3C chelate in the tridentate (kappa(3)), tetradentate (kappa(4)), and pentadentate (kappa(5)) modes was executed en route from two nonemissive dimer intermediates [Ir(kappa(3)-N3CH)Cl-2](2) (1) and [Ir(kappa(4)-N3C)Cl](2) (2). Next, a series of mononuclear Ir(III) complexes with the formulas [Ir(kappa(4)-N3C)Cl(py)] (3), [Ir(kappa(4)-N3C)Cl(dmap)] (4), [Ir(kappa(4)-N3C)-Cl(mpzH)] (5), and [Ir(kappa(4)-N3C)Cl(dmpzH)] (6), as well as diiridium complexes [Ir-2(kappa(5)-N3C)-(mpz)(2)(CO)(H)(2)] (7) and [Ir-2(kappa(5)-N3C)-(dmpz)(2)(CO)(H)(2)] (8), were obtained upon treatment of dimer 2 with pyridine (py), 4-dimethylaminopyridine (dmap), 4-methylpyrazole (mpzH), and 3,5-dimethylpyrazole (dmpzH), respectively. These Ir(III) metal complexes were identified using spectroscopic methods and by X-ray crystallographic analysis of representative derivatives 3, 5, and 7. Their photophysical and electrochemical properties were investigated and confirmed by the theoretical simulations. Notably, green-emitting organic light-emitting diode (OLED) on the basis of Ir(III) complex 7 gives a maximum external quantum efficiency up to 25.1%. This result sheds light on the enormous potential of this tetradentate coordinated chelate in the development of highly efficient iridium complexes for OLED applications.

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An article Nickel(II) and Palladium(II) Complexes Bearing an Unsymmetrical Pyrrole-Based PNN Pincer and Their Norbornene Polymerization Behaviors versus the Symmetrical NNN and PNP Pincers WOS:000460600300060 published article about VINYL POLYMERIZATION; CATALYTIC-ACTIVITY; ETHYLENE POLYMERIZATION; ADDITION POLYMERIZATION; NI COMPLEXES; LIGAND; PHOSPHINE; IRON; COORDINATION; PCN in [Das, Sanghamitra; Subramaniyan, Vasudevan; Mani, Ganesan] Indian Inst Technol Kharagpur, Dept Chem, Kharagpur 721302, W Bengal, India in 2019.0, Cited 104.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. Formula: C5H8N2

Unsymmetrical pincers have been shown to be better than the corresponding symmetrical pincers in several catalysis reactions. A new unsymmetrical PNN propincer, 2-(3,5-dimethylpyrazolylmethyl)-5-(diphenylphosphinomethyl)-pyrrole (1), was synthesized from pyrrole through Mannich bases in a good yield. In addition, the new byproduct 2-(3,5-dimethylpyrazolylmethyl)-5-(dimethylaminomethyl)-N-(hydroxymethyl)pyrrole was also isolated. The reaction of 1 with [PdCl2(PhCN)(2)] and Et3N in toluene yielded [PdCl-{C4H2N-2-(CH(2)Me(2)pz)-5-(CH2PPh2)-kappa P-3,N,N}] (2). The analogous reaction between 1 and [NiCl2(DME)] or NiX2 (X = Br, I) in the presence of NEt3 in acetonitrile afforded [NiX{C4H2N-2-(CH(2)Me(2)pz)-5-(CH2PPh2)-kappa P-3,N,N}] (3; X = Cl, Br, I). All complexes were structurally characterized. The norbornene polymerization behaviors of the unsymmetrical pincer complexes 2 and 3 in the presence of MMAO or EtAlCl2 were compared with those of the symmetrical pincer complexes chloro[2,5-bis(3,5-dimethylpyrazolylmethyl)pyrrolido]-palladium(II) (NNN), chloro[2,5-bis(diphenylphosphinomethyl)pyrrolido]palladium(II), and chloro[2,5-bis(diphenylphosphinomethyl)pyrrolido]nickel(II) (PNP) at different temperatures. The PNN and NNN complexes exhibited far greater activity on the order of 10(7) g of PNB/mol/h, with quantitative yields in some cases, in comparison to the PNP pincer palladium and nickel complexes. This trend was also supported by the Pr-i group substituted PNP nickel and palladium pincer complexes. These polymerization behaviors are explained using steric crowding around the metal atom with the support of NMR studies and suggested that the activity increases as the N-pyrazole donor increases. Polymers were characterized by H-1 NMR, IR, TGA, and powder XRD methods.

Formula: C5H8N2. Welcome to talk about 67-51-6, If you have any questions, you can contact Das, S; Subramaniyan, V; Mani, G or send Email.

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

SDS of cas: 67-51-6. I found the field of Chemistry; Physics very interesting. Saw the article Hydroxyl-functionalized pyrazolium ionic liquids to catalyze chemical fixation of CO2: Further benign reaction condition for the single-component catalyst published in 2019.0, Reprint Addresses Ren, TG; Wang, L; Zhang, JL (corresponding author), Inst Upconvers Nanoscale Mat, Kaifeng, Henan, Peoples R China.. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole.

Lots of ionic liquids have been utilized as catalyst for the coupling reaction of carbon dioxide with epoxides, however, catalyzed conditions could not be regarded as benign, especially when no co-catalyst and/or organic solvent is involved. A series of hydroxyl-functionalized pyrazolium ionic liquids are firstly synthesized. They would efficiently catalyze the cycloaddition of carbon dioxide and propylene oxide under 110 degrees C and 1.0 MPa carbon dioxide initial pressure with 1 mol% catalyst during 4 h resulting in the product yield of 91.2%. The catalytic condition is greatly refined as compared with other single-component ionic liquids with simple anion. Simultaneously, the effect of reaction temperature, amount of catalyst, carbon dioxide initial pressure, and reaction time is explored along with the reusability of catalyst For most of epoxides with terminal substituted group, HEEPzBr presents acceptable catalytic activity. The difference of HEMPzBr, HEEPzBr, and HPEPzBr is also explored by the density functional theory calculations. (C) 2019 Elsevier B.V. All rights reserved.

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Pyrazole – Wikipedia,
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COA of Formula: C5H8N2. Recently I am researching about SECONDARY BUILDING UNITS; X-RAY STRUCTURES; CRYSTAL-STRUCTURE; PADDLE-WHEEL; MAGNETIC-PROPERTIES; SPECTRAL CHARACTERIZATION; COMPLEXES; COPPER(II); 1,10-PHENANTHROLINE; SOLIDS, Saw an article supported by the SERB, New Delhi [SB/S2/JCB-85/2014]. Published in ELSEVIER SCIENCE SA in LAUSANNE ,Authors: Rajakannu, P; Kaleeswaran, D; Banerjee, S; Butcher, RJ; Murugavel, R. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole

Structural modulation of transition metal carboxylates has been studied by employing different auxiliary ligands in the reactions of metal acetates with substituted benzoic acids. A series of neutral transition metal benzoates [Cu(tbba)(2)(imH)(2)] (1), [Cu(tipba)(2)(2,4,6-collidine)(2)] (2), [Co(tbba)(2) (dmpH)(2)] (3), [Co(tipba)(2)(imH)(2)] (4), [M (tmba)(2)(pymeH)(2)] (M = Cu (5), Co (6) and Zn (7)), [Zn(tmba)(2)(pydmeH(2))] (8), [Cu-2(tmba)(2)(pydmeH(2))(2)] [(tmba)(2)(tmbaH)(2)] (9) and [Zn-2(dmp)(2) (tbba)(2)(dmpH)(2)] (10) have been isolated as products from the reaction between the respective metal acetates and substituted benzoic acids (acids used: 4-tert-butylbenzoic acid (tbbaH), 2,4,6-triisopropylbenzoic acid (tipbaH), 2,4,6-trimethylbenzoic acid (tmbaH)) and N-donor auxiliary ligands (imidazole (imH), 3,5-dimethylpyrazole (dmpH), 2,4,6-collidine, 2-pyridinemethanol (pymeH), and pyridine-2,6-dimethanol (pydmeH(2))). The new complexes have been characterized by both analytical and spectroscopic methods. The molecular structures of 1-10 have further been established by single crystal X-ray diffraction studies. The complexes 1-8 are mononuclear, while compounds 9 and 10 have been found to be dinuclear due to the role of benzoic acid in 9 and pyrazolate anion as bridging ligand in 10. The geometry around the metal ion is square-planar in 1 and 2, tetrahedral in 3, 4 and 10, octahedral in 5-7 and 9 and trigonal-bipyramidal in 8. Complexes with ligands that contain additional functional groups such as > NH and -OH are involved in hydrogen bonding interactions. These weak interactions lead to the formation of 1-D linear polymers or 2-D sheets.

Welcome to talk about 67-51-6, If you have any questions, you can contact Rajakannu, P; Kaleeswaran, D; Banerjee, S; Butcher, RJ; Murugavel, R or send Email.. COA of Formula: C5H8N2

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

Computed Properties of C5H8N2. Authors Yuan, Y; Xu, RJ; Zhao, HK in ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD published article about in [Yuan, Yang; Zhao, Hongkun] Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou 225002, Jiangsu, Peoples R China; [Xu, Renjie] Yangzhou Univ, Guangling Coll, Yangzhou 225009, Jiangsu, Peoples R China in 2019.0, Cited 1.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6

Errors were discovered regarding the published equation coefficients of Yao and co-workers (2017) for mathematically describing the solubility of 3,5-dimethylpyrazole in nine organic solvents using the NRTL model. Larger differences were found between our back-calculated data and those reported in the authors’ published paper. The equation parameters were re-regressed based on the reported solubility data. (C) 2018 Elsevier Ltd.

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Safety of 3,5-Dimethyl-1H-pyrazole. I found the field of Chemistry; Energy & Fuels; Materials Science very interesting. Saw the article Chemical and electrochemical water oxidation mediated by bis(pyrazol-1-ylmethyl)pyridine-ligated Cu(i) complexes published in 2021.0, Reprint Addresses Swarts, AJ (corresponding author), Northwest Univ, Res Focus Area Chem Resource Beneciat, Catalysis & Synth Res Grp, 11 Hoffman St, ZA-2531 Potchefstroom, South Africa.; Swarts, AJ (corresponding author), Univ Witwatersrand, Sch Chem, Mol Sci Inst, ZA-2050 Johannesburg, South Africa.. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole.

Herein a series of novel bis(pyrazol-1-ylmethyl)pyridine-ligated Cu(i) complexes, C1-C4, bearing different donating groups [[H(C1), Me(C2), t-Bu(C3), Ph(C4)])] on the pyrazole rings, were synthesized and investigated as pre-catalysts in chemical and electrocatalytic water oxidation reactions. Ligands, 2,6-bis((1H-pyrazol-1-yl)methyl)pyridine (L1), 2,6-bis((1H-pyrazol-1-yl)methyl)pyridine (L2), 2,6-bis((3,5-di-tert-butyl-1H-pyrazol-1-yl)methyl)pyridine (L3), and 2,6-bis((3,5-diphenyl-1H-pyrazol-1-yl)methyl)pyridine (L4) were reacted with Cu(MeCN)(4)PF6 to form complexes C1-C4 respectively. Cerium ammonium nitrate (CAN), sodium m-periodate, and sodium persulfate were investigated as chemical oxidants in chemical water oxidation. Complexes C1-C4 showed catalytic activity towards chemical water oxidation in the presence of CAN as the primary oxidant at 25 degrees C. Complex C2 was the most active with a turnover number (TON) of 4.6 and a turnover frequency (TOF) of 0.31 s(-1). The least active catalyst was complex C4, with a TON of 2.3 and a TOF of 0.0086 s(-1). This observed difference in catalytic activity between the complexes illustrated the key role that electronic effects play during catalysis. Other oxidants evaluated with C2 were sodium m-periodate (TON, 3.77; TOF 0.14 s(-1)) and sodium persulfate (TON, 4.02; TOF 0.044 s(-1)) however, CAN exhibited the greatest activity. Complexes C1-C4 were investigated in electrocatalytic water oxidation at a neutral pH of 6.5. Complex C2 was the most active in electrocatalytic water oxidation as well, exhibiting an overpotential of 674 mV and TOF of 9.77 s(-1) (at 1.7 V vs. NHE), which is better than most reported copper(ii) complexes. These Cu(i) complexes C1-C4 show potential as efficient chemical and electrocatalytic water oxidation catalysts, which can be achieved by fine-tuning the steric and electronic properties of the catalysts.

Welcome to talk about 67-51-6, If you have any questions, you can contact Makhado, T; Das, B; Kriek, RJ; Vosloo, HCM; Swarts, AJ or send Email.. Safety of 3,5-Dimethyl-1H-pyrazole

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An article Cytotoxicity and reactivity of a redox active 1,4-quinone-pyrazole compound and its Ru(II)-p-cymene complex WOS:000510860900058 published article about ANTICANCER; QUINONES; CANCER; GLUTATHIONE; DERIVATIVES; ANTIFUNGAL; ACTIVATION; RUTHENIUM; REDUCTASE; DESIGN in [Purkait, Kallol; Mukherjee, Arindam] Indian Inst Sci Educ & Res Kolkata, Dept Chem Sci, Nadia 741246, India in 2020.0, Cited 62.0. Quality Control of 3,5-Dimethyl-1H-pyrazole. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6

Quinone based compounds display activation in hypoxia, an environment prevalent in tumours. We have synthesized a bis(pyrazole) based 1,4-quinone compound suitable for metal chelation. The quinone (L2) converted to hydroquinone (H(2)L1) during the complex synthesis leading to [Ru-II(eta(6)-p-cym)(H(2)L1)Cl](PF6) (1). We found from ‘FINMR studies that in the methanolic solution L2 stoichiometrically converted to H(2)L1 while oxidizing the methanol to formaldehyde. L2 crystallized in monoclinic space group I2/a while complex 1 crystallizes in P2(1)/c. Cyclic voltammetry of the redox non-innocent L2 showed quasi-reversible (Delta Ep = 67 mV) redox behaviour with E-1/2 at 0.12 V w.r.t. NHE. Complex 1 is stable at pH 7.4 in presence of 4 mM chloride and does not hydrolyse even up to 24 h. L2 showed IC50, values of 155 and 123 mu M against metastatic breast adenocarcinoma (MDA-MB231) and pancreatic carcinoma (MIA PaCa-2) respectively. L2 gets activated by ca. 2.7-fold in hypoxia against MIA PaCa-2 cells. The mechanistic studies showed ROS accumulation and oxidation of NADH to NAD(+), which may be responsible for the cytotoxicity. The reactivity studies showed that conversion to hydroquinone by reaction with NADH or glutathione is irreversible. Complex 1 is not cytotoxic up to 100 mu M in normoxia or hypoxia. Complex 1 displays irreversible redox behavior in cyclic voltammetry displaying two overlapping oxidation peaks at 1.00 and 1.57 V w.r.t. NHE, which may be assigned to the conversion of hydroquinone to quinone and Ru-II -> Ru-III respectively.

Quality Control of 3,5-Dimethyl-1H-pyrazole. Welcome to talk about 67-51-6, If you have any questions, you can contact Purkait, K; Mukherjee, A or send Email.

Reference:
Pyrazole – Wikipedia,
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Application In Synthesis of 3,5-Dimethyl-1H-pyrazole. Recently I am researching about ASYMMETRIC TRANSFER HYDROGENATION; PYRAZOLYL-IMIDAZOLYL LIGAND; COMPLEXES; ALCOHOLS; ESTERS; DEHYDROGENATION; MECHANISM; BEARING, Saw an article supported by the Science and Technology Department of Shaanxi Province [2018KW-032]; Key Science and Technology Innovation Team of Shaanxi Province [2017KCT-37]. Published in AMER CHEMICAL SOC in WASHINGTON ,Authors: Cao, ZQ; Qiao, H; Zeng, FL. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole

A new family of pyridyl-based NNN pincer ligands bearing a remote pendent OH group were developed. Considerable acceleration effects on the activity of Ru-catalyzed transfer hydrogenation of ketones were imparted by the pendent OH group, and importantly, introducing a CH2OH group to the 4′-position of the pyrazolyl moiety is an appropriate choice. The results present a general strategy for exploring bifunctional ligands to construct effective catalysts.

Application In Synthesis of 3,5-Dimethyl-1H-pyrazole. Welcome to talk about 67-51-6, If you have any questions, you can contact Cao, ZQ; Qiao, H; Zeng, FL or send Email.

Reference:
Pyrazole – Wikipedia,
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