Tag: M.W:100-200

In heterogeneous catalysis, the catalyst is in a different phase from the reactants. 1111-67-7, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1111-67-7, name is Cuprous thiocyanate. In an article£¬Which mentioned a new discovery about 1111-67-7

Construction of two unique W/S/Cu cluster-based coordination polymers affected by pseudohalogen ligands

The pseudohalogen ligands affecting the architectures of heterothiometallic Mo(W)/S/Cu(Ag) cluster-based coordination polymers (CPs) was firstly explored. In the presence of CuCN or CuSCN with distinct pseudohalogen ligands, two unique W/S/Cu cluster-based CPs [WS4Cu3(CN)(4,4?-bipy)2]n (1, 4,4?-bipy = 4,4?-bipyridine) and {[WS4Cu4(4,4?-bipy)4][WS4Cu4(SCN)4(4,4?-bipy)2]¡¤0.5DMSO}n (2) were achieved by interdiffusion reaction of (NH4)2WS4 and 4,4?-bipy. 1 and 2 were characterized by X-ray single and powder crystal diffractions, elemental analysis, IR, UV-Vis, thermogravimetric analysis. 1 exhibits a neutral 2-D (4,4) network, fabricated by 4-connected T-shaped [WS4Cu3]+ clusters, single CN- bridges and double 4,4?-bipy bridges. While, 2 possesses an unusual 3-D fourfold non-equivalent interpenetrated architecture, consisting of two cationic and two anionic planar ‘open’ [WS4Cu4]2+ cluster-based frameworks; the cationic and anionic architectures are constructed by double 4,4?-bipy bridges and single 4,4?-bipy bridges, respectively, and all show the diamondoid topologies.

The proportionality constant is the rate constant for the particular unimolecular reaction. the reaction rate is directly proportional to the concentration of the reactant. I hope my blog about 1111-67-7 is helpful to your research. 1111-67-7

Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

1317-39-1, In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1317-39-1, name is Copper(I) oxide, introducing its new discovery.

Oxime derivatives

The invention concerns oxime derivatives of the formula I STR1 wherein R4 is hydrogen, (1-4C)alkyl, halogeno-(2-4C)alkyl, hydroxy-(2-4C)alkyl, cyano-(1-4C)alkyl, phenyl or phenyl-(1-4C)alkyl; R5 is hydrogen, (1-4C)alkyl, halogeno-(2-4C)alkyl, hydroxy-(2-4C)alkyl, cyano-(1-4C)alkyl, phenyl or phenyl-(1-4C)alkyl, or a heteroaryl moiety selected from pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, furyl, thienyl, oxazolyl and thiazolyl; A4 is (1-4C)alkylene; Ar1 is phenylene, pyridinediyl or pyrimidinediyl; A1 is a direct link to X1 or A1 is (1-4C)alkylene; X1 is oxy, thio, sulphinyl or sulphonyl; Ar2 is phenylene, pyridinediyl, pyrimidinediyl, thiophenediyl, furandiyl or thiazolediyl; R1 is hydrogen, (1-4C)alkyl, (3-C)alkenyl or (3-4C)alkynyl; and R2 and R3 together form a group of the formula –A2 –X2 –A3 — wherein each of A2 and A3 is independently (1-3C)alkylene and X2 is oxy, thio, sulphinyl, sulphonyl or imino; or a pharmaceutically-acceptable salt thereof; processes for their manufacture; pharmaceutical compositions containing them and their use as 5-lipoxygenase inhibitors.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.1317-39-1, you can also check out more blogs about1317-39-1

Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

In homogeneous catalysis, the catalyst is in the same phase as the reactant. The number of collisions between reactants and catalyst is at a maximum.In a patent, 1317-39-1, name is Copper(I) oxide, introducing its new discovery. 1317-39-1

Triazapentadienes as acaricides

Certain heteroaryl triazapentadienes with acaricidal properties and their preparation are described.

Note that a catalyst decreases the activation energy for both the forward and the reverse reactions and hence accelerates both the forward and the reverse reactions.1317-39-1, you can also check out more blogs about1317-39-1

Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

1111-67-7, Chemistry can be defined as the study of matter and the changes it undergoes. You¡¯ll sometimes hear it called the central science because it is the connection between physics and all the other sciences, starting with biology.1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS, introducing its new discovery.

Electronic Modulation of Electrocatalytically Active Center of Cu7S4 Nanodisks by Cobalt-Doping for Highly Efficient Oxygen Evolution Reaction

Cu-based electrocatalysts have seldom been studied for water oxidation because of their inferior activity and poor stability regardless of their low cost and environmentally benign nature. Therefore, exploring an efficient way to improve the activity of Cu-based electrocatalysts is very important for their practical application. Modifying electronic structure of the electrocatalytically active center of electrocatalysts by metal doping to favor the electron transfer between catalyst active sites and electrode is an important approach to optimize hydrogen and oxygen species adsorption energy, thus leading to the enhanced intrinsic electrocatalytic activity. Herein, Co-doped Cu7S4 nanodisks were synthesized and investigated as highly efficient electrocatalyst for oxygen evolution reaction (OER) due to the optimized electronic structure of the active center. Density-functional theory (DFT) calculations reveal that Co-engineered Cu7S4 could accelerate electron transfer between Co and Cu sites, thus decrease the energy barriers of intermediates and products during OER, which are crucial for enhanced catalytic properties. As expected, Co-engineered Cu7S4 nanodisks exhibit a low overpotential of 270 mV to achieve current density of 10 mA cm-2 as well as decreased Tafel slope and enhanced turnover frequencies as compared to bare Cu7S4. This discovery not only provides low-cost and efficient Cu-based electrocatalyst by Co doping, but also exhibits an in-depth insight into the mechanism of the enhanced OER properties.

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Reference£º
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

The ligand (50.0 mg, 0.11 mmol) was added to a suspension of copper(II) halogenide (0.11 mmol) in methanol (3 ml). The mixture was stirred at r. t. for 16 h. The precipitate was then filtered off and dried in vacuo. The pure compounds were obtained by recrystallization from dichloromethane and pentane.

With the rapid development of chemical substances, we look forward to future research findings about Copper(I) bromide

Reference£º
Article; Sauer, Desiree C.; Wadepohl, Hubert; Polyhedron; vol. 81; (2014); p. 180 – 187;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

General procedure: The complexes were prepared according to the following method [14]: 1mmol of copper(I) bromide or copper(I) chloride is stirred in methanol until complete dissolution. Then, 2.1 mmol of the corresponding phosphine ligand was added. The mixture was stirred at 60C for 30min. under nitrogen atmosphere. A microcrystalline precipitate was obtained by concentration of the solution at reduced pressure. The solid product was dissolved in a dichloromethane/methanol mixture and the solution was gradually cooled to 4C to give an air stable and colorless crystalline solid suitable for X-ray single-crystal diffraction studies.

7787-70-4 is used more and more widely, we look forward to future research findings about Copper(I) bromide

Reference£º
Article; Espinoza, Sully; Arce, Pablo; San-Martn, Enrique; Lemus, Luis; Costamagna, Juan; Faras, Liliana; Rossi, Miriam; Caruso, Francesco; Guerrero, Juan; Polyhedron; vol. 85; (2015); p. 405 – 411;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

General procedure: The complexes were prepared according to the following method [14]: 1mmol of copper(I) bromide or copper(I) chloride is stirred in methanol until complete dissolution. Then, 2.1mmol of the corresponding phosphine ligand was added. The mixture was stirred at 60C for 30min. under nitrogen atmosphere. A microcrystalline precipitate was obtained by concentration of the solution at reduced pressure. The solid product was dissolved in a dichloromethane/methanol mixture and the solution was gradually cooled to 4C to give an air stable and colorless crystalline solid suitable for X-ray single-crystal diffraction studies.

7787-70-4 is used more and more widely, we look forward to future research findings about Copper(I) bromide

Reference£º
Article; Espinoza, Sully; Arce, Pablo; San-Martin, Enrique; Lemus, Luis; Costamagna, Juan; Farias, Liliana; Rossi, Miriam; Caruso, Francesco; Guerrero, Juan; Polyhedron; vol. 85; (2014); p. 405 – 411;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

7787-70-4, Copper(I) bromide is a copper-catalyst compound, ?involved in a variety of chemical synthesis. Rlated chemical reaction is continuously updated

7787-70-4, General procedure: An acetonitrile solution (5 mL) of cuprous chloride (0.008 g,0.084 mmol) was introduced dropwise to a solution of 1(0.040 g, 0.084 mmol) in dichloromethane (5 mL). The reactionwas allowed to stir at room temperature for 6 h. Afterthat, solvent was evaporated under vacuum to give microcrystallineproduct of 5 as a white solid.

The synthetic route of 7787-70-4 has been constantly updated, and we look forward to future research findings.

Reference£º
Article; Kumar, Saurabh; Balakrishna, Maravanji S; Journal of Chemical Sciences; vol. 129; 8; (2017); p. 1115 – 1120;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

As a common heterocyclic compound, it belongs to quinuclidine compound,Quinuclidine-4-carboxylic acid hydrochloride,40117-63-3,Molecular formula: C8H14ClNO107,mainly used in chemical industry, its synthesis route is as follows.,7787-70-4

Triethyl phosphite (183g, 1.1 mol) was added to a suspension of copper(I) bromide (164.5 g, 1.15 mol) in toluene (500 ml). The mixture was heated at 80C for 3 h with stirring, then left to cool and settle. The clear solution was decanted from the solid residue and the solvent evaporated on a rotary evaporator at 60C, to provide copper(I) bromide triethyl phosphite complex as a clear colourless oil, 336g (94% crude yield).

With the complex challenges of chemical substances, we look forward to future research findings about Copper(I) bromide,belong copper-catalyst compound

Reference£º
Patent; ASTRAZENECA AB; ASTRAZENECA UK LIMITED; WO2006/67412; (2006); A1;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”

 

Copper(I) bromide, cas is 7787-70-4, it is a common heterocyclic compound, the copper-catalyst compound, its synthesis route is as follows.,7787-70-4

An acetonitrile (10mL) solution of CuBr (0.019g, 0.132mmol) was added dropwise to a well stirred solution of 1 (0.028g, 0.066mmol) in dichloromethane (10mL) at room temperature. The reaction mixture was stirred for 4h, all the solvent was evaporated under vacuum and the residue obtained was washed with 2¡Á5mL of petroleum ether to afford an analytically pure yellow solid. Yield: 85% (0.04g). Mp: >270C. Anal. Calcd. for C20H30N4Br2Cu2O2P2¡¤CH3CN: C, 35.31; H, 4.44; N, 9.36%. Found: C, 34.72; H, 4.02; N, 9.81%.

As the rapid development of chemical substances, we look forward to future research findings about 7787-70-4

Reference£º
Article; Ananthnag, Guddekoppa S.; Mague, Joel T.; Balakrishna, Maravanji S.; Journal of Organometallic Chemistry; vol. 779; (2015); p. 45 – 54;,
Copper catalysis in organic synthesis – NCBI
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”