Tag: M.W=0-100

An article The First Example of Palladium(II)-Catalyzed Oxidative C-N Cross Coupling of 2H-Imidazole 1-Oxide with Azoles WOS:000485299000017 published article about DIRECT FUNCTIONALIZATION; OXIDES; BOND; DERIVATIVES; ARYLATION; RADICALS; LITHIUM; AZINES in [Akulov, Alexey A.; Varaksin, Mikhail V.; Charushin, Valery N.; Chupakhin, Oleg N.] Ural Fed Univ, 19 Mira St, Ekaterinburg 620002, Russia; [Varaksin, Mikhail V.; Charushin, Valery N.; Chupakhin, Oleg N.] Russian Acad Sci, Ural Branch, Postovsky Inst Organ Synth, 22 S Kovalevskoi,20 Akad Skaya St, Ekaterinburg 620990, Russia in 2019.0, Cited 28.0. Recommanded Product: 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

We report the first example of the direct nucleophilic C-H functionalization of cyclic aldonitrone, a derivative of 2H-imidazole 1-oxide, with 1H-imidazole and 3,5-dimethylpyrazole rings using oxidative C-N cross-coupling reactions in the presence of palladium(II) catalyst. The obtained new bisheterocyclic N-oxides may be of interest as molecules with potential biological activity and as functional organic materials.

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

Andrews, E; Lopez-Ruiz, JA; Egbert, JD; Koh, K; Sanyal, U; Song, M; Li, DS; Karkamkar, AJ; Derewinski, MA; Holladay, J; Gutierrez, OY; Holladay, JD in [Andrews, Evan; Lopez-Ruiz, Juan A.; Egbert, Jonathan D.; Koh, Katherine; Sanyal, Udishnu; Karkamkar, Abhijeet J.; Derewinski, Miroslaw A.; Holladay, Johnathan; Gutierrez, Oliver Y.; Holladay, Jamie D.] Pacific Northwest Natl Lab, Inst Integrated Catalysis, Energy & Environm Directorate, Richland, WA 99352 USA; [Song, Miao; Li, Dongsheng] Pacific Northwest Natl Lab, Phys & Computat Sci Directorate, Richland, WA 99352 USA; [Derewinski, Miroslaw A.] Polish Acad Sci, Jerzy Haber Inst Catalysis & Surface Chem, PL-30239 Krakow, Poland published Performance of Base and Noble Metals for Electrocatalytic Hydrogenation of Bio-Oil-Derived Oxygenated Compounds in 2020.0, Cited 52.0. Application In Synthesis 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.

Electrocatalytic hydrogenation is a particularly attractive approach for converting the most unstable compounds in biogenic feedstocks at ambient conditions without external H-2. Here, we synthesized a variety of carbon-supported transition metal catalysts and characterized their activity for the electrocatalytic hydrogenation of a series of model compounds and pyrolysis bio-oil. Carbonyl compounds, especially aromatic aldehydes, such as furfural and benzaldehyde, are particularly inclined to hydrogenation driven by an applied current. This was verified with pure solutions of the model compounds and with pyrolysis bio-oil, where we achieved stable and steady continuous operation on Pd. When optimal catalyst composition was chosen, the conversion of benzaldehyde shifted from alcohol production (e.g., on Pd and Cu) to dimerization (e.g., on Co, Ni, and Zn). Pd and Cu were shown to offer the best compromise between reaction rates and efficiency although, in general, base metals offer similar conversions but better efficiencies than noble metals. Thus, the present work offers foundational results and guidelines for choosing the optimal metal catalyst and the applied potential for processing organic feedstocks as a function of its composition.

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Pyrazole – Wikipedia,
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Name: 3,5-Dimethyl-1H-pyrazole. In 2019.0 CHEM-US published article about HYPERVALENT IODINE CHEMISTRY; PHENOL ETHERS; CHLORINATION; SUBSTITUTION; HALOGENATION; HETEROCYCLES; AMINATION; PYRIDINES; ENABLES; ARENES in [Fosu, Stacy C.; Chen, Andrew D.; Nagib, David A.] Ohio State Univ, Dept Chem & Biochem, Columbus, OH 43210 USA; [Hambira, Chido M.; Fuchs, James R.] Ohio State Univ, Coll Pharm, Div Med Chem & Pharmacognosy, Columbus, OH 43210 USA in 2019.0, Cited 51.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6.

A strategy for C-H functionalization of arenes and heteroarenes has been developed to allow site-selective incorporation of various anions, including Cl, Br, OMs, OTs, and OTf. This approach is enabled by in situ generation of reactive, non-symmetric iodanes by combining anions and bench-stable Phl(OAc)(2). The utility of this mechanism is demonstrated via para-selective chlorination of medicinally relevant arenes, as well as site-selective C-H chlorination of heteroarenes. Spectroscopic, computational, and competition experiments describe the unique nature, reactivity, and selectivity of these transient, unsymmetrical iodanes.

Name: 3,5-Dimethyl-1H-pyrazole. Welcome to talk about 67-51-6, If you have any questions, you can contact Fosu, SC; Hambira, CM; Chen, AD; Fuchs, JR; Nagib, DA or send Email.

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Pyrazole – Wikipedia,
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In 2020.0 EUR UROL FOCUS published article about RESISTANCE in [Cimino, Sebastiano; Verze, Paolo; Venturino, Luca; Alessio, Paolo; Migliara, Alfonso; Imbimbo, Ciro; Mirone, Vincenzo; Russo, Giorgio Ivan; Morgia, Giuseppe] Univ Catania, Dept Urol, Urol Sect, Catania, Italy; [Cimino, Sebastiano; Verze, Paolo; Venturino, Luca; Alessio, Paolo; Migliara, Alfonso; Imbimbo, Ciro; Mirone, Vincenzo; Russo, Giorgio Ivan; Morgia, Giuseppe] Univ Naples Federico II, Dept Neurosci Reprod Sci & Odontostomatol, Naples, Italy in 2020.0, Cited 18.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. COA of Formula: C5H8N2

Background: Transrectal ultrasound-guided prostate biopsy (TRBx) or transperineal Bx (TPBx) are considered alternative approaches for the diagnosis of prostate cancer (PCa). However, urinary tract infection (UTI) or other complications could be more frequent in the TRBx approach. Objective: To determine the complication rate following different antimicrobial prophylaxis (AMP; fosfomycin trometamol [FT] vs beta-lactame or fluorochinolones [FQ]) in patients undergoing TRBx or TPBx. Design, setting, and participants: The analyses were based on prospectivelycollected data of a cohort of patients who underwent TRBx or TPBx for elevated prostate-specific antigen (PSA; >= 4 ng/ml) or clinical suspicion of PCa, between September 2016 and March 2017. Patients received a single dose of 3 g oral FT (group A) or, alternatively, FQ or beta-lactame (group B). Intervention:TRBx versus TPBx. Outcome measurements and statistical analysis: Adjustment variables consisted of age, PSA, biopsy technique (TPBx vs TRBx), and antibiotic prophylaxis (FT vs beta-lactame or FQ) using 1:1 propensity-score matching. Overall, 526 patients were considered, of whom 258 received FT (group A) and the other 258 received beta-lactame or FQ (group B). Results and limitations: Overall complications occurred in 390 (75.58%) and major complications in 67/516 (12.98%). Lower prevalence of UTIs was detected in group A (34.1%) compared with that in group B (43.4%; p = 0.03), while similar rates of haematuria (54.7% vs 55.4%), haemospermia (39.5% vs 33.0%), and acute urinary retention (11.6% vs 9.3%) were detected in groups A and B. We found that group B (odds ratio [OR]: 1.54; p = 0.03), I grade haematuria (OR: 6.17; p < 0.01), and II grade haematuria (OR: 5.13; p < 0.01) were significantly associated with increased risk of UTIs. Conclusions: AMP with fluoroquinoles or beta-lactam antibiotics increased the rate of UTIs, when compared with FT, in patients undergoing TRBx or TPBx. The appearance of haematuria or haemospermia is associated with UTIs, suggesting the possibility of tailoring the strategy for prophylaxis in this category of patients. Patient summary: In this study, comparing complications after transrectal ultrasound-guided prostate biopsy versus transperineal biopsy, prophylaxis with fluoroquinoles or beta-lactam antibiotics increased the rate of urinary tract infections when compared with fosfomycin trometamol, regardless of the type of biopsy approach. (C) 2018 European Association of Urology. Published by Elsevier B.V. All rights reserved. COA of Formula: C5H8N2. Welcome to talk about 67-51-6, If you have any questions, you can contact Cimino, S; Verze, P; Venturino, L; Alessio, P; Migliara, A; Imbimbo, C; Mirone, V; Russo, GI; Morgia, G or send Email.

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

An article Synthesis of quinoxaline, benzimidazole and pyrazole derivatives under the catalytic influence of biosurfactant-stabilized iron nanoparticles in water WOS:000563611100002 published article about SILVER NANOPARTICLES; METAL NANOPARTICLES; OXIDE NANOPARTICLES; BIOGENIC SYNTHESIS; GREEN SYNTHESIS; EXTRACT in [Arde, Satyanarayan M.; Patil, Audumbar D.; Salunkhe, Rajashri S.] Shivaji Univ, Dept Chem, Kolhapur 416004, Maharashtra, India; [Patil, Audumbar D.] Sanjay Ghodawat Univ, Sch Sci, Dept Chem, Kolhapur, Maharashtra, India; [Mane, Ananda H.] KITs Coll Engn, Dept Chem, Kolhapur 416234, Maharashtra, India; [Salokhe, Prabha R.] YC Warana Mahavidyalaya, Dept Chem, Warananagar 416113, MS, India in 2020.0, Cited 39.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. SDS of cas: 67-51-6

We have reported the synthesis, characterization, and catalytic applications of amorphous iron nanoparticles (FeNPs) using aqueous leaves extract of renewable natural resourceBoswellia serrataplant. Synthesized FeNPs were stabilized in situ by the addition of aqueous pod extracts ofAcacia concinnaas a biosurfactant (pH 3.11). The structural investigation of biosynthesized nanoparticles was performed using UV-visible spectroscopy, X-ray diffraction analysis, selected area electron diffraction, energy-dispersive X-ray spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, thermogravimetric analysis, and BET analysis. The FeNPs were amorphous in nature with average particle size similar to 19 nm and successfully employed as heterogeneous catalyst for the synthesis of quinoxaline, benzimidazole, and pyrazole derivatives in aqueous medium at ambient conditions. The FeNPs could be recycled up to five times with modest change in the catalytic activity. [GRAPHICS] .

Welcome to talk about 67-51-6, If you have any questions, you can contact Arde, SM; Patil, AD; Mane, AH; Salokhe, PR; Salunkhe, RS or send Email.. SDS of cas: 67-51-6

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

Recently I am researching about ACIDIC AQUEOUS-SOLUTION; PT(II) COMPLEXES; PALLADIUM(II) COMPLEXES; CRYSTAL-STRUCTURE; PD(II) COMPLEXES; CHELATE SUBSTITUENTS; ANGULAR-OVERLAP; METAL-COMPLEXES; PLATINUM(II); MECHANISM, Saw an article supported by the University of KwaZulu-Natal. Published in ELSEVIER SCIENCE INC in NEW YORK ,Authors: Onunga, DO; Bellam, R; Mutua, GK; Sitati, M; BalaKumaran, MD; Jaganyi, D; Mambanda, A. The CAS is 67-51-6. Through research, I have a further understanding and discovery of 3,5-Dimethyl-1H-pyrazole. Product Details of 67-51-6

Four [(NNN)(PdCl)-Cl-(II)]+ complexes [chloride-(2,2 ‘:6 ‘,2 ”-terpyridine)Pd-(II)]Cl (PdL1), [chlorido(2,6-bis(N-pyrazol-2-yl)pyridine)Pd(II)]Cl (PdL2), [chlorido(2,6-bis(3,5-dimethyl-N-pyrazol-2-yl)pyridine)Pd(II)]Cl (PdL3) and [chlorido(2,6-bis(3,5-dimethyl-N-pyrazol-2-ylmethyl)pyridine)Pd(II)]BF4 (PdL4) were synthesized and characterized. The rates of substitution of these Pd(II) complexes with thiourea nucleophiles viz; thiourea (Tu), N,N ‘-dimethylthiourea (Dmtu) and N,N,N ‘,N ‘-tetramethylthiourea (Tmtu) was investigated under pseudo first order conditions as a function of nucleophile concentration [Nu] and temperature using the stopped-flow technique. The observed rate constants vary linearly with [Nu]; k(obs) = k(2)[Nu] and decreased in the order: PdL1 > PdL2 > PdL3 >> PdL4. The lower pi-acceptability of the cis-coordinated N-pyrazol-2-yl groups (which coordinates via pyrazollic-N pi-donor atoms) of the PdL2-4 significantly decelerates the reactivity relative to PdL1. Furthermore, the six-membered chelates having methylene bridge in PdL4 do not allow pi-extension in the ligand and introduces steric hindrance further lowering the reactivity. Trends in DFT calculated data supported the observed reactivity trend. Spectrophotometric titration data of complexes with calf thymus DNA (CT-DNA) and viscosity measurements of the resultant mixtures suggested that associative interactions occur between the complexes and CT-DNA, likely through groove binding with high binding constants (K-b = 10(4) M-1). In vitro MTT [3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide] cytotoxic activity data showed that PdL1 was the most potent complex against MCF7 breast cancer cells; its IC50 value is lower than that of cisplatin. The results demonstrate how modification of a spectator ligand can be used to slow down the reactivity of Pd(II) complexes. This is of special importance in controlling drug toxicity in both pharmaceutical and biomedical applications.

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

de Oliveira, MT; Alves, JMA; Morais, SFD; Braga, AAC in [de Oliveira, Marcelo T.; Alves, Julia M. A.] Univ Sao Paulo, Sao Carlos Inst Chem, Av Trabalhador Sao Carlense 400, BR-13560970 Sao Carlos, SP, Brazil; [Morais, Sara F. de A.; Braga, Ataualpa A. C.] Univ Sao Paulo, Inst Quim, Dept Quim Fundamental, Sao Paulo, SP, Brazil published Prediction of N-15 NMR chemical shifts for nitrogenated aromatic compounds in 2020.0, Cited 33.0. Category: pyrazoles-derivatives. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6.

Building on recent developments, we compare performance of two distinct protocols, namely SMD-mPW1PW91/6-311+G(2d,p) and CPCM-OLYP/pcSseg-2, for the computation of N-15 chemical shifts of nitrogenated aromatic compounds. The latter shows best overall performance (MAD 5.3 ppm) albeit results in chloroform favors the former. [GRAPHICS] .

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

He, SR; Cao, CC; Wang, JL; Yang, JZ; Cheng, ZJ; Yan, BB; Pan, Y; Chen, GY in [He, Sirong; Cao, Congcong; Wang, Jinglan; Cheng, Zhanjun; Yan, Beibei] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China; [Yang, Jiuzhong; Pan, Yang] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China; [Cheng, Zhanjun; Yan, Beibei] Tianjin Univ, Tianjin Engn Res Ctr Organ Wastes Safe Disposal &, Tianjin Key Lab Biomass Waste Utilizat, Key Lab Efficient Utilizat Low & Medium Energy, Tianjin 300072, Peoples R China; [Chen, Guanyi] Tianjin Univ Commerce, Sch Mech Engn, Tianjin 300134, Peoples R China published Pyrolysis study on cattle manure: From conventional analytical method to online study of pyrolysis photoionization time-of-flight mass spectrometry in 2020.0, Cited 38.0. SDS of cas: 67-51-6. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6.

Cattle manure is a kind of abundant agriculture waste but potential renewable resource to be converted into fuel by pyrolysis. The pyrolysis behavior of cattle manure was analyzed by three methods in this work: thermogravimetric analyzer (TG), pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and pyrolysis photoionization time-of-flight mass spectrometry (Py-PI-TOFMS). The pyrolysis process of cattle manure included four stages, dehydration stage, lignocellulose decomposition stage, lignin and protein decomposition stage, char and mineral matter decomposition stage. The products were mainly classified into six groups: ketones, aldehydes, phenolic compounds, acids, hydrocarbons and N-containing compounds. Based on the time-evolved profiles and temperature-programmed profiles, the characteristics of these major products were analyzed and discussed. Maillard reaction has great effects on the pyrolysis process of cattle manure because cellulose can easily react with protein to produce abundant Amadori products and then generate cyclopentanes and furanmethanol. In addition, some Amadori products and amino acids can also be cyclized to generate N-heterocycle compounds like pyrroles and pyrazines. The decomposition of lignin basic units with more methoxy groups require higher reaction temperature, and the removal of hydroxy and methoxy group on phenols mainly occurred at around 350 degrees C. Furthermore, primary decomposition pathways of cattle manure were also proposed and discussed.

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

An article Pyrolysis study on cattle manure: From conventional analytical method to online study of pyrolysis photoionization time-of-flight mass spectrometry WOS:000580632500022 published article about DAIRY MANURE; PY-GC/MS; TG-FTIR; COMBUSTION; CONVERSION; BIOOIL; TEMPERATURE; MECHANISM; KINETICS; LIGNIN in [He, Sirong; Cao, Congcong; Wang, Jinglan; Cheng, Zhanjun; Yan, Beibei] Tianjin Univ, Sch Environm Sci & Engn, Tianjin 300072, Peoples R China; [Yang, Jiuzhong; Pan, Yang] Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Anhui, Peoples R China; [Cheng, Zhanjun; Yan, Beibei] Tianjin Univ, Tianjin Engn Res Ctr Organ Wastes Safe Disposal &, Tianjin Key Lab Biomass Waste Utilizat, Key Lab Efficient Utilizat Low & Medium Energy, Tianjin 300072, Peoples R China; [Chen, Guanyi] Tianjin Univ Commerce, Sch Mech Engn, Tianjin 300134, Peoples R China in 2020.0, Cited 38.0. The Name is 3,5-Dimethyl-1H-pyrazole. Through research, I have a further understanding and discovery of 67-51-6. Computed Properties of C5H8N2

Cattle manure is a kind of abundant agriculture waste but potential renewable resource to be converted into fuel by pyrolysis. The pyrolysis behavior of cattle manure was analyzed by three methods in this work: thermogravimetric analyzer (TG), pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS) and pyrolysis photoionization time-of-flight mass spectrometry (Py-PI-TOFMS). The pyrolysis process of cattle manure included four stages, dehydration stage, lignocellulose decomposition stage, lignin and protein decomposition stage, char and mineral matter decomposition stage. The products were mainly classified into six groups: ketones, aldehydes, phenolic compounds, acids, hydrocarbons and N-containing compounds. Based on the time-evolved profiles and temperature-programmed profiles, the characteristics of these major products were analyzed and discussed. Maillard reaction has great effects on the pyrolysis process of cattle manure because cellulose can easily react with protein to produce abundant Amadori products and then generate cyclopentanes and furanmethanol. In addition, some Amadori products and amino acids can also be cyclized to generate N-heterocycle compounds like pyrroles and pyrazines. The decomposition of lignin basic units with more methoxy groups require higher reaction temperature, and the removal of hydroxy and methoxy group on phenols mainly occurred at around 350 degrees C. Furthermore, primary decomposition pathways of cattle manure were also proposed and discussed.

Computed Properties of C5H8N2. Bye, fridends, I hope you can learn more about C5H8N2, If you have any questions, you can browse other blog as well. See you lster.

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

An article Structural diversity of ethylzinc derivatives of 3,5-substituted pyrazoles WOS:000599093600035 published article about 4-COORDINATE ALUMINUM ALKYLS; EXTERNAL CALIBRATION CURVES; COORDINATION CHEMISTRY; ZINC; COMPLEXES; DINUCLEAR; OXYGENATION; REACTIVITY; LIGANDS; MOLECULES in [Komorski, Szymon; Leszczynski, Michal K.; Lewinski, Janusz] Warsaw Univ Technol, Dept Chem, Noakowskiego 3, PL-00664 Warsaw, Poland; [Leszczynski, Michal K.; Justyniak, Iwona; Lewinski, Janusz] Polish Acad Sci, Inst Phys Chem, Kasprzaka 44-52, PL-01224 Warsaw, Poland in 2020.0, Cited 45.0. Recommanded Product: 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

Equimolar reactions of Et2Zn with 3,5-dimethylpyrazole (H-pz(Me2)), 3,5-di-iso-propylpyrazole (H-pz(iPr2)), 3,5-di-tert-butylpyrazole (H-pz(tBu2)) and indazole (H-ind) were investigated in toluene or tetrahydrofuran (as a coordinating solvent). A series of diverse ethylzinc pyrazolates and indazolates were identified using advanced NMR spectroscopy and the single crystal X-ray diffraction techniques. The NMR experiments indicate that dimeric moieties of the general formula [EtZn(pz)](2) or [Et2Zn2(pz)(2)(THF)] are favoured in solution. Nevertheless, these types of complexes are kinetically labile and tend to undergo ligand scrambling reactions according to the Schlenk equilibrium. For example, the alkyl substituents in the pz(Me2) and pz(iPr2) ligands do not appear to be a strong determinant of the dimeric moieties and the composition of the isolated complexes by crystallisation from the parent reaction mixture varies between spiro-type tri- and tetranuclear aggregates, [Et2Zn3(pz)(4)(THF)(x)] (x = 0 or 2) and [Et2Zn4(pz)(6)(THF)(2)], respectively. The nonstoichiometric formula of these organozinc derivatives is likely related to both the Schlenk-type equilibria and solubility of the respective moieties. In turn, the high steric demands of the 3,5-di-tert-butylpyrazolate ligand promote the dimeric form in solution and the solid state. Interestingly, the ethylzinc indazolate complex also does not undergo a redistribution reaction and yields a dimer.

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