Category: 1111-67-7

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Assembly of chiral two- and three-dimensional copper(I) pseudohalide based coordination polymers with asymmetrically substituted pyrazine and pyrimidine ligands

The coordination polymers 2?[(CuCN)2(mu-2 Mepyz)], 3?[CuCN(mu-2 Mepyz)] and 3?[CuCN(mu-4 Mepym)] (1-3) (2 Mepyz = 2-methylpyrazine; 4 Mepym = 4-methylpyrimidine) may be prepared by self-assembly in acetonitrile solution at 100 C (1, 3) or without solvent at 20 C (2). All three contain 1?[CuCN] chains that are bridged by the bidentate aromatic ligands into sheets in 1 and 3 D frameworks in 2 and 3. Reaction of CuSCN with these heterocyclic diazines at 100 C leads to formation of the lamellar coordination polymers 2?[(CuSCN)(mu-2 Mepyz)] (4) and 2?[CuSCN ¡¤ (4 Mepym-kappaN1)] (5), which contain respectively 1?[CuSCN] chains and trans-trans fused 2?[CuSCN] sheets as substructures. The presence of an asymmetric substitution pattern in 2 Mepyz and 4 Mepym induces the adoption of a chiral structure by 2 and 5 (space groups P212121 and P1).

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

 

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Copper(I) pseudohalide complexes with 4,6-dimethylpyrimidine-2(1H)-thione and triphenylphosphane as ligands. The X-ray crystal structures of [Cu(N3)(dmpymtH)(PPh3)2] and [Cu(NCS)(dmpymtH)(PPh3)2]

The preparation of mixed-ligand copper (I) coordination compounds containing pseudohalides (azide and thiocyanate), 4,6-dimethylpyrimidine-2(1H)-thione (dmpymtH), and triphenylphosphane is described. The crystalline and molecular structure of [Cu(N3)(dmpymth)(PPh3)2] (2) and [Cu(NCS)(dmpymtH)(PPh3)]2 (3) have been determined by X-ray diffraction methods. The copper atom has a tetra-coordinate CuNP2S chromophore with distorted tetrahedral coordination in both complexes. Vibrational and 1H, 13C, 31P NMR spectra of the complexes are discussed and related to the structures

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

 

Because a catalyst decreases the height of the energy barrier, Formula: CCuNS, its presence increases the reaction rates of both the forward and the reverse reactions by the same amount.Formula: CCuNS, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a article£¬once mentioned of Formula: CCuNS

Dehydroxylative Trifluoromethylthiolation, Trifluoromethylation, and Difluoromethylation of Alcohols

CF3S, CF3 and HCF2 groups have been identified as valuable functionalities for drug development. Despite significant accomplishments in the trifluoromethylthiolation, trifluoromethylation and difluoromethylation reactions, directly converting common functional groups into CF3S, CF3 or HCF2 groups is still highly desirable. Described here is the dehydroxylative trifluoromethylthiolation, trifluoromethylation and difluoromethylation of alcohols promoted by a R3P/ICH2CH2I system. All of these dehydroxylative reactions were achieved under mild conditions via the activation of the hydroxyl group by the R3P/ICH2CH2I system. A wide substrate scope and good functional group tolerance were observed.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Formula: CCuNS, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1111-67-7, in my other articles.

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

 

Electric Literature of 1111-67-7, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. Electric Literature of 1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a Article, authors is Li, Zhongfeng£¬once mentioned of Electric Literature of 1111-67-7

Synthesis and structural characterization of six pentanuclear and tetranuclear Mo/W-Cu-S clusters with BIS(Diphenylphosphanyl) methane

Six heterothiometalic clusters, namely,[WS4Cu4(dppm)4]-(ClO4)2?2DMF?MeCN (1), [MoS4Cu4(dppm)4](NO3)2?MeCN (2) [MoS4Cu3(dppm)3](ClO4)?4H2O (3), [WS4Cu3(dppm)3](NO3)?4H2O (4), [WS4Cu3(dppm)3]SCN?CH2Cl2 (5), and [WS4Cu3(dppm)3]I?CH2Cl2 (6) [dppm = bis (diphenylphosphanyl)methane] were synthesized. Compounds 1?4 were obtained by the reactions of (NH4)2MS4 (M = Mo, W) with [Cu2(mu2-dppm)2(MeCN)2(ClO4)2] {or [Cu(dppm)(NO3)]2} in the presence of 1,10-phen in mixed solvent (CH3CN/CH2Cl2/DMF for 1 and 2, CH2Cl2/CH3OH/DMF for 3 and 4. Compounds 5 and 6 were obtained by one-pot reactions of (NH4)2WS4 with dppm and CuSCN (or CuI) in CH2Cl2/CH3OH. These clusters were characterized by single-crystal X-ray diffraction as well as IR,1H NMR, and31P NMR spectroscopy. Structure analysis showed that compounds 1 and 2 are ?saddle-shaped? pentanuclear cationic clusters, whereas compounds 3?6 are ?flywheel-shaped? tetranuclear cationic clusters. In 1 and 2, the MS42- unit (M = W, Mo) is coordinated by four copper atoms, which are further bridged by four dppm molecules. In compounds 3?6, the MS42- unit is coordinated by three copper atoms and each copper atom is bridged by three dppm ligands.

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

 

Related Products of 1111-67-7, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1111-67-7, molcular formula is CCuNS, introducing its new discovery.

Synthesis, structural and spectroscopic study of polymeric copper(I) thiocyanato complexes [Cu(NCS)L](n) (L = methyl nicotinate and ethyl nicotinate) and [HL] [Cu(NCS)2] (HL = H-ethyl isonicotinate)

Three new copper(I) thiocyanato complexes [Cu(NCS)L](n) (L = methyl nicotinate 1, ethyl nicotinate 2), and [HL] [Cu(NCS)2] (HL = H-ethyl isonicotinate 3), have been prepared and characterized by spectroscopic and crystallographic methods. All three complexes display MLCT transitions in the visible region, as well as visible solid state emission spectra at room temperature. Their IR spectra are measured and discussed. In the structure of 1 each copper atom links two S atoms from two mu-S,S,N thiocyanato ligands and two nitrogen atoms from a pyridine nucleus and from a third mu-S,S,N thiocyanate group; the two S atoms bind another copper atom forming a Cu2S2 cyclic unit. The ladder propagates along the a axis of the unit cell. The structure of 2 features CuS2N2 coordination with approximate tetrahedral environment, mu-S,S,N bridging thiocyanate groups giving rise to corrugated layers at y = 1/4. Complex 3 consists of an N-protonated ethyl isonicotinate cation and a polymeric [Cu(NCS)2]- anion. Each trigonal planar copper atom in the anion is coordinated by two S atoms from a mu-S,N thiocyanate bridge and a terminal S-thiocyanate group, and the third site is occupied by the end nitrogen of a mu-S,N thiocyanate bridge. The terminal NCS group forms a hydrogen bond of the type N-H¡¤¡¤¡¤N with an N-H group of the [HL]+ cation. The planar ribbon which runs in the a direction is further stabilized by N-H¡¤¡¤¡¤O hydrogen bonds. (C) 2000 Elsevier Science Ltd.

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. Related Products of 1111-67-7

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

 

Application of 1111-67-7, Catalysts function by providing an alternate reaction mechanism that has a lower activation energy than would be found in the absence of the catalyst. In some cases, the catalyzed mechanism may include additional steps.In a article, 1111-67-7, molcular formula is CCuNS, introducing its new discovery.

5-Sulfinyl-2-pyridinecarboxylic acids

5-Sulfinyl-2-pyridinecarboxylic acids, e.g. those of the formula STR1 OR FUNCTIONAL DERIVATIVES THEREOF, ARE HYPOTENSIVE AGENTS.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data. Application of 1111-67-7, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1111-67-7, in my other articles.

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

 

Children learn through play, and they learn more than adults might expect. Science experiments are a great way to spark their curiosity, get their minds active, and encourage them to do something that doesn¡¯t involve a screen. Cuprous thiocyanate,introducing its new discovery. Application In Synthesis of Cuprous thiocyanate

Chelating and bridging diphosphinoamine (PPh2)2N(iPr) complexes of copper(I)

The ligand bis(diphenylphosphino)isopropylamine (dppipa) has been shown to be a versatile ligand sporting different coordination modes and geometries dictated by copper(I). Most of the molecular structures were confirmed by X-ray crystallography. It is found in a chelating mode, in a monomeric complex when the ligand to copper ratio is 2:1. A tetrameric complex is formed when low ratios of ligand to metal (1:2) were used. But with increasing ratios of ligand to metal (1:1 and 2:1), a trimer or a dimer was obtained depending on the crystallization conditions. Variable temperature 31P{1H} NMR spectra of these complexes in solution showed that the Cu-P bond was labile and the highly strained 4-membered structure chelate found in the solid state readily converted to a bridged structures. On the other hand, complexes with the ligand in a bridging mode in the solid state did not form chelated structures in solution. The effect of adding tetra-alkylammonium salts to solutions of various complexes of dppipa were probed by 31P{1H} NMR and revealed the effect of counter ions on the stability of complexes in solution.

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

 

A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, Product Details of 1111-67-7, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. Product Details of 1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a Article, authors is Youngme, Sujittra£¬once mentioned of Product Details of 1111-67-7

The coordination chemistry of mono and bis(di-2-pyridylamine)copper(II) complexes: Preparation, characterization and crystal structures of [Cu(L)(NO2)2], [Cu(L)(H2O)2(SO4)], [Cu(L)2(NCS)](SCN)¡¤0.5DMSO and [Cu(L)2(SCN)2]

The crystal structures of two mono(dpyam)copper(II) complexes, [Cu(dpyam)(NO2)2] (1) and [Cu(dpyam)(H2O)2(SO4)] (2) and two dithiocyanate compounds containing bis(dpyam)copper(II) units, [Cu(dpyam)2(NCS)](SCN)¡¤0.5DMSO (3) and [Cu(d- pyam)2(SCN)2] (4) have been determined by X-ray crystallography. The second orthorhombic form of the monomeric Cu(II) complex 1 was obtained by the reaction of di-2-pyridylamine (dpyam) with CuCl and NaNO2 in water-methanol solution. Each copper(II) ion in 1 exhibits a tetrahedrally-distorted square base of the CuN2O2 chromophore, with off-the-z-axis coordinated nitrito groups weakly bound in approximately axial positions. Complex 2 is an example of a polymeric copper(II) derivative containing the bidentate bridging sulfate ligand in the long-bonded axial positions. Each copper(II) ion in 2 shows an elongated tetragonal octahedral stereochemistry. The CuN4N? chromophore of 3 involves a square-based pyramidal structure, slightly distorted towards a trigonal bipyramidal stereochemistry, tau = 0.13. One of the SCN- anions is bonded to the copper(II) ion via the N atom in the axial position of the square pyramid. Complex 4 is centrosymmetric and octahedrally elongated, with the SCN- anions coordinating in axial positions via the S atom. The structures of complexes 1-4 and their ESR and electronic reflectance spectra are compared with those of related complexes.

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

 

Application of 1111-67-7, A catalyst don’t appear in the overall stoichiometry of the reaction it catalyzes, but it must appear in at least one of the elementary reactions in the mechanism for the catalyzed reaction. 1111-67-7, Name is Cuprous thiocyanate, molecular formula is CCuNS. In a Article£¬once mentioned of 1111-67-7

Preparation of buta-1,3-diynyl complexes of platinum(II) and their use in the construction of neutral molecular squares: Synthesis, structural and theoretical characterisation of cyclo-{Pt(mu-C?CC?C)(dppe)}4 and related chemistry

Copper(I)-catalysed reactions of cis-PtCl2(L)2 (L= PEt3, L2 = dppe, dppp) with buta-1,3-diyne have given the corresponding diynyl complexes, cis-Pt(C?CC?CH)2(L)2 (L= PEt3 1, L2 = dppe 2, dppp 3) whose solid-state structures have been determined from single crystal X-ray diffraction studies. Theoretical calculations were carried out to probe the electronic structure of these diynyl complexes. Complex 2 reacts with Co2(CO)8 to give a bis-adduct 5 and with Ru3(mu-dppm)(CO)10 to give a mono-adduct 6; in both, the least hindered C?C triple bond(s) is(are) coordinated. Lithiation (LiBut) of 2 gives a dilithio derivative, which has been converted to dimethyl 7 or mono-SiMe3 8 or -Au(PPh3) 9 complexes. Cu(I) and Ag(I) (MI) adducts (quot;tweezerquot; complexes) have been obtained from reactions of 2 with MISCN or [MI(NCMe)4]+. An ES mass spectrometric study of the interactions of 2 with Group 1 cations and with Tl+ is also described; comparative experiments with {W(CO)3Cp}2(mu-C8), in which the four C?C triple bonds do not have a “tweezer” conformation, have also been carried out. The degree of association is determined by the competitive solvation of the Group 1 cation. Coupling of the buta-1,3-diynyl complexes with Pt(OTf)2(L?)2 gives homo- or mixed-ligand molecular squares cyclo-{(L)2Pt(mu-C?CC?C)2Pt(L?) 2}2 (L, L? = PEt3, L2, L?2 = dppe, dppp; not all combinations), of which the molecular structure of cyclo-{Pt(mu-C?CC?C)(dppe)}4 17 is described (as solvates containing dmso). The molecular squares form adducts with substituted ammonium triflates [NH2R2][OTf] (R = Et, Pri, Cy; NH2R2 = dbuH) and with Group 11 cations [MI(NCMe)]+.

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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, 1111-67-7, name is Cuprous thiocyanate, introducing its new discovery. COA of Formula: CCuNS

Architectural alterations from 1D to 3D coordination polymers based on a pair of isomeric linear and V-shaped triazole/thiophene/triazole bridging ligands

Four pairs of transition-metal [Co(II), Zn(II), Ni(II) and Cu(I)] coordination polymers have been prepared and characterized based on a pair of isomeric linear and V-shaped rigid thiophene-centered ditriazole bridging ligands [2,5-di(1H-1,2,4-triazol-1-yl)thiophene (L1) and 3,4-di(1H-1,2,4-triazol-1-yl)thiophene (L2)]. They are formulated as {[Co(L1)2(H2O)2](ClO4)2}n (1), {[Zn(L1)2(H2O)2](ClO4)2}n (2), {[Ni(L1)2(H2O)2](ClO4)2}n (3), {[Co(L2)2(H2O)2](ClO4)2}n (4), {[Zn(L2)2(H2O)2](ClO4)2}n (5), {[Ni(L2)2(H2O)2](ClO4)2}n (6), [Cu(L1)(CN)]n (7) and [Cu2(L2)(SCN)2]n (8), where distinct metal/ligand ratios (1:2, 1:1 and 2:1) and dimensions [one-dimensional (1D), two-dimensional (2D) and three-dimensional (3D)] have been observed because of the alterations of the coordination modes of central metal ions, the shape and conformation of ligands and the participancy of counterions. X-ray single-crystal diffraction analyses reveal that 1D chains have been formed in the cases of 4-6, while 2D planes have been built in 1-3. In contrast, 3D networks have been constructed in 7 and 8 with different topologies because of the further linkage of CN- and SCN- counterions.

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