Day: February 23, 2023

A series bi-spin transition metal(II) complexes based on triazole nitronyl nitroxide radical was written by Li, Ting;Shi, Xiu Juan;Chen, Peng Yun;Yu, Si Jia;Tian, Li. And the article was included in Inorganica Chimica Acta in 2017.Quality Control of copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

Four new transition complexes were obtained by using triazole nitronyl nitroxide radical as ligand. [Mn(4-Me-3-Nit-trz)(hfac)₂] (1) and [M(4-Me-3-Nit-trz)(hfac)₂]₂ [M = Co(II) 2, Ni(II) 3, Cu(II) 4; 4-Me-3-Nit-trz = 2-[3-(4-methyl-l,2,4-triazolyl)]-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide; hfac = hexafluoroacetylacetone] were characterized structurally and magnetically. The metal ions in the four complexes are all in six-coordinated environment with four O atoms from two hfac^– ligands, and one radical O atom and one triazole N atom from a two teeth 4-Me-3-Nit-trz ligand. The magnetic behaviors for 1–3 indicate that the metal ions and the direct coordinated radicals are antiferromagnetically coupled (J_Mn-rad = -49.61 cm^-1, for 1; J_Co-rad = -22.36 cm cm^-1, for 2; J_Ni-rad = -115.39 cm^-1, for 3), whereas a ferromagnetic coupling between the Cu(II) ion and the nitroxide group (J_Cu-rad = 3.45 cm^-1) is observed in 4. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Quality Control of copper(ii)hexafluor-2,4-pentanedionate).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, inexpensive and low toxicity. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Quality Control of copper(ii)hexafluor-2,4-pentanedionate

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Field supported slow magnetic relaxation in a quasi-one-dimensional copper(II) complex with a pentaheterocyclic triphenodioxazine was written by Korchagin, D. V.;Ivakhnenko, E. P.;Demidov, O. P.;Akimov, A. V.;Morgunov, R. B.;Starikov, A. G.;Palii, A. V.;Minkin, V. I.;Aldoshin, S. M.. And the article was included in New Journal of Chemistry in 2021.Application In Synthesis of copper(ii)hexafluor-2,4-pentanedionate This article mentions the following:

A new copper(II) complex (1) was obtained by the reaction of a sterically crowded 2,4-di-(tert-butyl)-9-chloro-benzo[5,6][1,4]oxazine[2,3-b]phenoxazine bridging ligand with Cu(II) hexafluoroacetylacetonate. Compound 1 is a quasi-one-dimensional complex in which the Cu(hfac)₂ moieties are co-crystallized with the triphenodioxazine mols. through only weak Cu···N short intermol. interactions (the Cu···N distances are 2.732 and 2.752 Å). The magnetic AC susceptibility data show that in spite of the absence of zero-field splitting in the Cu(II) ion with S = 1/2, the compound demonstrates a slow magnetic relaxation behavior at a weak applied magnetic field (H_DC = 500 Oe). The EPR spectra and DC magnetic measurements show the strong axial anisotropy of the g-tensor. The temperature dependence of the relaxation time is well described by the combination of one-phonon direct and two-phonon Raman processes. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Application In Synthesis of copper(ii)hexafluor-2,4-pentanedionate).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. Copper has continued to be one of the most utilized and important transition metal catalysts in synthetic organic chemistry. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Application In Synthesis of copper(ii)hexafluor-2,4-pentanedionate

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Catalytic asymmetric [4+1] spiroannulation of α-bromo-β-naphthols with azoalkenes by an electrophilic dearomatization/S_RN1-debromination approach was written by Bai, Lu;Luo, Xin;Ge, Yicong;Wang, Hui;Liu, Jingjing;Wang, Yaoyu;Luan, Xinjun. And the article was included in CCS Chemistry in 2022.Recommanded Product: Copper(II) trifluoromethanesulfonate This article mentions the following:

An enantioselective [4+1]-spiroannulation of α-bromo-β-naphthols with azoalkenes has been developed for the one-step construction of a new class of pyrazoline-based spirocyclic mols. Using chiral Cu(II)/Box catalysts, asym. induction was achieved with high levels of enantioselectivity [up to 99:1 enantiomeric ratio (er)]. Notably, α-chloro- and α-iodo-substituted β-naphthols were also tolerated by this reaction. Mechanistic studies disclosed that this process was triggered by electrophile-facilitated dearomatization of α-bromo-β-naphthols and followed by the debromination via S_RN1-substitution with an in situ-formed N-nucleophile. The chiral copper(II)-species, bound with azoalkene moiety, was assumed to control the enantio-discrimination over the naphthoxy C-radical that was generated from the debromination step. Moreover, the potential utility of this protocol was greatly amplified by the derivatization of spirocyclic products through oxidative dearomatization of the other aromatic ring in the naphthyl fragment, providing a rather attractive route for the rapid generation of synthetically more valuable doubly dearomatized architectures. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Recommanded Product: Copper(II) trifluoromethanesulfonate).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The applications of Copper-based nanoparticles have received great attention due to the earth-abundant, low toxicity and inexpensive. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Recommanded Product: Copper(II) trifluoromethanesulfonate

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Electronic Differences between Coordinating Functionalities of Chiral Phosphine-Phosphites and Effects in Catalytic Enantioselective Hydrogenation was written by Suarez, Andres;Mendez-Rojas, Miguel A.;Pizzano, Antonio. And the article was included in Organometallics in 2002.HPLC of Formula: 205927-03-3 This article mentions the following:

A convenient synthesis of new chiral phosphine-phosphites (P-OP) was described. The versatility of the synthetic protocol developed gave ligands with different phosphine fragments and the choice of the stereogenic element location. Analyses of the values of ¹J_PSe of the corresponding diselenides are in accord with the expected lower σ-donor ability of the phosphite fragment, with respect to the phosphine group, and with an increase of phosphine basicity after substitution of Ph substituents by Me groups. Inspection of υ(CO) values on complexes RhCl(CO)(P-OP) demonstrated a variable π-acceptor ability of the phosphite group, compensating for the change of basicity of the phosphine functionality, as well as having a rather reduced electron d. at the metal center compared with diphosphine analogs. The distinct nature of the P functionalities also was evidenced in Rh-catalyzed enantioselective hydrogenation of Me Z-α-acetamidocinnamate (MAC). Thus, the coordination mode of the substrate is governed by the chiral ligand, directing the olefinic bond to a cis position with respect to the phosphite group, as demonstrated by NMR studies performed with [Rh(P-OP)(MAC)]⁺ complexes. In consequence, the phosphite group has a greater impact on the enantioselectivity of the product. However, the optical purity of the process also depends on the nature of the phosphine group, and hence, an appropriate election of both P functionalities is required for the attainment of excellent enantioselectivities (99% ee). In the experiment, the researchers used many compounds, for example, (S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3HPLC of Formula: 205927-03-3).

(S)-3,3′-Di-tert-butyl-5,5′,6,6′-tetramethylbiphenyl-2,2′-diol (cas: 205927-03-3) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. HPLC of Formula: 205927-03-3

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Reactivity of a formal Cu(III)-alkyl species toward aniline: a DFT investigation was written by Xu, Xinyu. And the article was included in Dalton Transactions in 2020.Product Details of 14781-45-4 This article mentions the following:

Although formal Cu(III) species were extensively proposed as key intermediates in a wide range of Cu-catalyzed reactions, the precise reactivity of these species remains inconclusive. Commonly, a formal reductive elimination mechanism is proposed for the product formation step. Through theor. study of the reactivity between a formal Cu(III)-alkyl species and aniline, a S_N2-like mechanism could also be responsible for coupling product formation. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Product Details of 14781-45-4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Product Details of 14781-45-4

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Detergent-free micelle-assisted synthesis of carbon-containing hexagonal CuS nanostructures for efficient supercapacitor electrode materials was written by Attia, Sayed Y.;Mohamed, Saad G.. And the article was included in Electrochimica Acta in 2022.Category: copper-catalyst This article mentions the following:

This work developed a novel approach to control the nanostructure morphol. of carbon-containing hexagonal CuS using a single-step solvothermal process. Herein, copper II hexafluoroacetylacetonate served as the copper source and played an efficient role as a detergent-free micelle-forming substance in the presence of two immiscible liquids (ethylene glycol and carbon disulfide). The latter form of which assisted spherical-like shell assembly of hexagonal carbon-containing CuS. Phys. characterization indicated successful carbon and fluorine doping of the hexagonal CuS structures inside bundles of spheres. This innovative construction can efficiently boost the Electrochem. properties of the as-prepared material for supercapacitor applications. The prepared electrode exhibited a superior specific capacitance/capacity of 1123 F g^-1 (561.5 C g^-1) at 1 A g^-1 and outstanding cycling stability. The assembled hybrid device displayed remarkable specific energy of 40 W h kg^-1 and a maximum specific power of 8.02 kW kg^-1. These results indicate the potential of this material as a promising electrode for highly efficient supercapacitors. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Category: copper-catalyst).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. The transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents has turned up as an exceedingly robust synthetic tool. Copper nanoparticles can also catalyze the coupling reaction of nitrogen-containing nucleophiles, phenols, thiols, xanthogenates, selenium ruthenium nucleophiles and the like.Category: copper-catalyst

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Metallo-Supramolecular Octahedral Cages with Three Types of Chirality towards Spontaneous Resolution was written by Xu, Chen;Lin, Quanjie;Shan, Chuan;Han, Xin;Wang, Hao;Wang, Heng;Zhang, Wenjing;Chen, Zhi;Guo, Chenxing;Xie, Yinghao;Yu, Xiujun;Song, Bo;Song, Heng;Wojtas, Lukasz;Li, Xiaopeng. And the article was included in Angewandte Chemie, International Edition in 2022.COA of Formula: C2CuF6O6S2 This article mentions the following:

Chirality is one of the most important intrinsic properties of (supra)mols. In this study, the authors obtained enantiomeric metallo-supramol. octahedra without using any chiral sources. Such cages were self-assembled by prochiral trispyridine ligand L , L = 2,7,12-tri(3-pyridyl)-5,5′,10,10′,15,15′-hexaethyltruxene, based on a C3h truxene core and Cu^II salts. Crystallization of the cages with BF₄^– as counterions afforded racemate crystals; while crystallizations of cages with ClO₄^– and OTf^– as counterions resulted in conglomerates with spontaneous resolution Three types of chirality were observed in each cage, including planar chirality of the truxene core, axial chirality from the pyridyl and truxene moieties, and propeller chirality of the pyridyl-Cu^II coordination sites. The cages reported here are among the largest discrete synthetic metallo-supramols. ever reported with chiral self-sorting behavior. Remarkably, the chiral cages exhibited very slow racemization even at low concentrations, suggesting their high stability in solution In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2COA of Formula: C2CuF6O6S2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. Transition metal-catalyzed chemical transformation of organic electrophiles and organometallic reagents belong to the most important cross-coupling reaction in organic synthesis. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.COA of Formula: C2CuF6O6S2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Electronic Band Structure and Electrocatalytic Performance of Cu₃N Nanocrystals was written by Wang, Li-Chen;Liu, Bo-Heng;Su, Chung-Yi;Liu, Wei-Szu;Kei, Chi-Chung;Wang, Kuan-Wen;Perng, Tsong-Pyng. And the article was included in ACS Applied Nano Materials in 2018.Computed Properties of C10H2CuF12O4 This article mentions the following:

High-d. discrete Cu₃N nanocrystals were deposited on XC-72 C black by plasma-enhanced at. layer deposition (PEALD). This heterostructured noble-metal-free catalyst served as a high-performance electrocatalyst for enhanced O reduction reaction (ORR). The electronic band structure of Cu₃N was determined by UPS and UV-visible spectrophotometry. The work function (Φ) of the Cu₃N nanocrystals is 5.04 eV, which is lower than that of Pt (∼5.60 eV). With lower energy barrier, Cu₃N would exhibit stronger electron transfer to cause ORR than typical Pt catalyst. The UPS anal. also confirmed the synergistic coupling effect between the Cu₃N nanocrystals and the C support. Coupled with the XC-72, the Cu₃N200/C showed even smaller Φ (=4.34 eV) than pure Cu₃N nanocrystals. Thus, the Cu₃N200/C electrocatalyst prepared with 200 ALD cycles exhibited similar ORR catalytic activity, significantly improved mass activity, and potentially greater durability than its Pt/C counterpart in alk. solution The fabrication of Cu₃N by PEALD and its good performance in ORR suggest a promising alternative of nonnoble-metal electrocatalyst for application in fuel cells. In the experiment, the researchers used many compounds, for example, copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4Computed Properties of C10H2CuF12O4).

copper(ii)hexafluor-2,4-pentanedionate (cas: 14781-45-4) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. It is clear from the impact copper catalysis has had on organic synthesis that copper should be considered a first line catalyst for many organic reactions.Computed Properties of C10H2CuF12O4

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

Chemicals from lignin by diol-stabilized acidolysis: reaction pathways and kinetics was written by Zhang, Zhenlei;Lahive, Ciaran W.;Winkelman, Jozef G. M.;Barta, Katalin;Deuss, Peter J.. And the article was included in Green Chemistry in 2022.Related Products of 34946-82-2 This article mentions the following:

The product selectivity, production rates and the required process conditions are important for technol. development. Selective lignin depolymerization on the prime β-O-4 motif provides an opportunity to obtain valuable functionalized phenolic monomers. Diol-stabilized acidolysis of lignin with sulfuric acid, triflic acid or triflate salts is a proven β-O-4 cleavage methodol. that forms acetals by trapping of released reactive aldehydes. For future scale-up, a better understanding of the prime reaction pathways and how these can be controlled upon changing reaction parameters is required. By using β-O-4 model compounds and ytterbium(III) triflate as catalyst, starting material conversion and product formation including two key intermediates, the diol adducts (in this study, ethylene glycol as the diol) and the vinyl ethers, were accurately monitored, allowing for detailed kinetic modeling. Over the selected temperature range (80-150°C), higher temperatures led to higher overall carbon balance and selectivity for the main desired acetal product. The kinetic modeling allowed for establishing a detailed reaction network with activation energies and rate constants These collectively led to new insights into the key steps involved in the diol-stabilized β-O-4 motif acidolysis and how the reaction selectivity can be manipulated by controlling the reaction temperature, and the ethylene glycol and water content. Al. The elucidation on reaction kinetics and networks constitutes a further step in the design of a diol-stabilized lignin acidolysis process. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Related Products of 34946-82-2).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. Copper catalyst has received great attention owing to the low toxicity and low cost. These ligands enable the reaction promoted in mild condition. The reaction scope has also been greatly expanded, rendering this copper-based cross-coupling attractive for both academia and industry. Related Products of 34946-82-2

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

8-(Methyltosylaminoethynyl)-1-naphthyl (MTAEN) Glycosides: Potent Donors in Glycosides Synthesis was written by Zhou, Si-Yu;Hu, Xin-Ping;Liu, Hui-Juan;Zhang, Qing-Ju;Liao, Jin-Xi;Tu, Yuan-Hong;Sun, Jian-Song. And the article was included in Organic Letters in 2022.Safety of Copper(II) trifluoromethanesulfonate This article mentions the following:

With 8-(methyltosylaminoethynyl)-1-naphthyl (MTAEN) glycoside as donors, a novel and efficient glycosylation protocol has been established. The MTAEN glycosylation protocol exhibits the merits of shelf-stable donors, mild catalytic promotion conditions, considerably extended substrate scope encompassing both free alcs., silylated alcs., nucleobases, primary amides, and C-type nucleophile acceptors, and applicability to various one-pot strategies for highly efficient synthesis of oligosaccharides, such as orthogonal one-pot, single-catalyst one-pot, and acceptor reactivity-controlled one-pot strategies. In the experiment, the researchers used many compounds, for example, Copper(II) trifluoromethanesulfonate (cas: 34946-82-2Safety of Copper(II) trifluoromethanesulfonate).

Copper(II) trifluoromethanesulfonate (cas: 34946-82-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. Copper nanoparticles can catalyze the Ullmann coupling reaction in a wide range of applications.Safety of Copper(II) trifluoromethanesulfonate

Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”