Category: 14694-95-2

Application of 14694-95-2. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about An insight into the catalytic hydrogenation mechanism of modified dendrimer-loaded rhodium ionic catalyst for unsaturated copolymer. Author is Zhou, Wei; Peng, Xiaohong.

A catalytic mechanism of ionic rhodium catalyst stabilized by macrcycles-modified dendrimer (G2-M(Rh3+)) for the hydrogenation of unsaturated copolymer was proposed. It was found that the co-catalyst of triphenylphosphine (PPh3) possessed significant influence on the catalytic hydrogenation activity of G2-M(Rh3+). An active specie of [Rh(PPh3)3]+ could be generated from a ligand exchange between G2-M(Rh3+) and PPh3 during the hydrogenation process, which could outstandingly improve the selective hydrogenation activity for unsaturated co-polymers. Totally different from other catalyst for hydrogenation, the active [Rh(PPh3)3]+ was reduced to Rh0 nanoparticles which could be further recaptured by the non-coordinated macrocycles in G2-M after hydrogenation. The Rh0 recapture could significantly reduce Rh residues in the hydrogenated co-polymers. This research can give an insight into the interaction of dendrimer-loaded Rh and the co-catalyst of PPh3 during hydrogenation processs. [Figure not available: see fulltext.].

The article 《An insight into the catalytic hydrogenation mechanism of modified dendrimer-loaded rhodium ionic catalyst for unsaturated copolymer》 also mentions many details about this compound(14694-95-2)Application of 14694-95-2, you can pay attention to it, because details determine success or failure

Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Synthetic Route of C54H45ClP3Rh. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about Application of Transition Metal-Catalyzed Decarbonylation of Aldehydes in the Total Synthesis of Natural Products. Author is Selakovic, Zivota; Nikolic, Andrea M.; Ajdacic, Vladimir; Opsenica, Igor M..

A review. Decarbonylation is an invaluable reaction, utilized by nature and chemists alike. In different life forms, such as prokaryotes, plants and animals, this transformation is catalyzed by aldehyde decarbonylases. In the laboratory, the transition metal-catalyzed (TMC) decarbonylation, which was first achieved in 1959, is by and large the dominant way for conducting this reaction. The carbon-carbon bond cleavage is most often made possible by RhCl(PPh3)3, i.e., Wilkinson’s catalyst, but other metals are also used, both in academia and in industry. In this review, we chose to present the applications of TMC decarbonylation in the synthesis of natural products and their derivatives More than 30 examples are showcased and categorized into three categories based on the essence of the role of the aldehyde group in the synthesis. A short outlook is given in the end, listing the different advantages and disadvantages of Wilkinson’s catalyst, as well as offering a brief prospect for the future.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Tris(triphenylphosphine)chlororhodium( cas:14694-95-2 ) is researched.Product Details of 14694-95-2.Labrum, Nicholas S.; Chen, Chun-Hsing; Caulton, Kenneth G. published the article 《A bis-Pyrazolate Pincer on Reduced Cr Deoxygenates CO2: Selective Capture of the Derived Oxide by CrII》 about this compound( cas:14694-95-2 ) in Chemistry – A European Journal. Keywords: chromium carbonate pyridylpyrazolate complex preparation crystal structure; deoxygenation carbon dioxide chromium pyridylpyrazolate dimer complex; CO2; aggregate; chromium; pincer; reduction. Let’s learn more about this compound (cas:14694-95-2).

Reduction of the bis-(pyrazolyl)pyridine complex [LCr]2 with stoichiometric KC8 in THF produces a species that is reactive with CO2 to produce an aggregate composed of paramagnetic K2L2Cr2(CO3) linked by KCl into a product of formula [K2L2Cr2(CO3)]4·2KCl. X-ray diffraction reveals a pincer hydrocarbon exterior and an inorganic interior composed of K+, Cl- and carbonate oxygens. Every Cr is five coordinate and square pyramidal, with the axial N donor weakly bonded to Cr due to the Jahn-Teller effect of a high spin d4 configuration. Reaction with 13CO2 confirms that carbonate here is derived from CO2, that oxide is derived from CO2, and that CO is indeed released, since it is not a competent ligand to CrII. Guiding principles for selectivity in CO2 reduction are deduced from the diverse successful mol. constructs to date.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, Non-U.S. Gov’t, ACS Biomaterials Science & Engineering called Thromboresistance of Silicones Modified with PEO-Silane Amphiphiles, Author is Ngo, Bryan Khai D.; Barry, Mikayla E.; Lim, Kendrick K.; Johnson, Jessica C.; Luna, David J.; Pandian, Navaneeth K. R.; Jain, Abhishek; Grunlan, Melissa A., which mentions a compound: 14694-95-2, SMILESS is [Rh]Cl.P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3.P(C4=CC=CC=C4)(C5=CC=CC=C5)C6=CC=CC=C6.P(C7=CC=CC=C7)(C8=CC=CC=C8)C9=CC=CC=C9, Molecular C54H45ClP3Rh, Safety of Tris(triphenylphosphine)chlororhodium.

The antifouling properties of poly(ethylene oxide) (PEO)-silane amphiphiles as surface-modifying additives (SMAs) in a condensation cure silicone have been previously demonstrated against simple protein solutions Comprising an oligo(dimethylsiloxane) tether (m = 13 or 30) and PEO segment (n = 8), sustained protein resistance was achieved even in the absence of a cross-linkable triethoxysilane group, particularly when comprising the longer tether. To probe their potential for thromboresistance, PEO-silane amphiphile SMAs were used to bulk-modify silicones and evaluated for adhesion resistance against whole human blood under both static and dynamic conditions. Both a crosslinkable (XL diblock, m = 13) and a non-crosslinkable (Diblock, m = 30) SMA were evaluated at various concentrations (5-50μmol SMA/g silicone) in a condensation cure silicone. Under static conditions, silicones modified with either SMA at concentrations of 10μmol/g or greater were effective in reducing adhesion of human fibrinogen and platelets. Dynamic testing further showed that modified silicones were able to reduce protein adsorption and thrombus formation. This occurred at 5 and 10μmol/g for silicones modified with XL diblock, m = 13 and diblock, m = 30 SMAs, resp. Combined, these results indicate the effectiveness of PEO-silane amphiphiles as SMAs in silicone for improved thromboresistance.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Most of the natural products isolated at present are heterocyclic compounds, so heterocyclic compounds occupy an important position in the research of organic chemistry. A compound: 14694-95-2, is researched, SMILESS is [Rh]Cl.P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3.P(C4=CC=CC=C4)(C5=CC=CC=C5)C6=CC=CC=C6.P(C7=CC=CC=C7)(C8=CC=CC=C8)C9=CC=CC=C9, Molecular C54H45ClP3RhJournal, Industrial & Engineering Chemistry Research called Hydrogenation of Polybutadiene at High Pressure, Author is Menossi, Matias; Ciolino, Andres; Quinzani, Lidia M.; Zabaloy, Marcelo S.; Milanesio, Juan M., the main research direction is hydrogenation polybutadiene high pressure pressure.Application In Synthesis of Tris(triphenylphosphine)chlororhodium.

The problem of low reaction rate due to poor mass transfer in the two-fluid-phase conventional hydrogenation of unsaturated polymers can be overcome by using di-Me ether/n-pentane as a light solvent mixture as the medium to carry out the reaction. In this work, a series of polybutadiene (PB) batch hydrogenation reactions were performed at high-pressure using Wilkinson/triphenylphosphine as a homogeneous catalyst/cocatalyst. Hydrogenated PBs with 86%-100% of saturation degree were obtained by changing processing variables: overall d., temperature, stirring frequency, initial hydrogen (H2)/double bonds ratio, global concentration of catalyst/cocatalyst, and reaction time. The variables that most affect the process are temperature, H2 excess, stirring frequency, and reaction time. By increasing these variables, the larger the saturation degree will be. The use of Wilkinson’s catalyst gives place to totally hydrogenated PB four times faster than conventional hydrogenation based on homogeneous catalysis (e.g., RhCl(PPh3)3, RhCl(P(C6H4-m-SO3Na))3, RhCl(PPh2(C6H4-m-SO3Na))) but giving place to some scission and crosslinking reactions.

Although many compounds look similar to this compound(14694-95-2)Application In Synthesis of Tris(triphenylphosphine)chlororhodium, numerous studies have shown that this compound(SMILES:[Rh]Cl.P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3.P(C4=CC=CC=C4)(C5=CC=CC=C5)C6=CC=CC=C6.P(C7=CC=CC=C7)(C8=CC=CC=C8)C9=CC=CC=C9), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Application In Synthesis of Tris(triphenylphosphine)chlororhodium. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about Stereoselective β-Mannosylation via Anomeric O-Alkylation with L-Sugar-Derived Electrophiles. Author is Hettiarachchi, Ishani Lakshika; Meng, Shuai; Chahine, Mira; Li, Xiaohua; Zhu, Jianglong.

A total synthesis of the trisaccharide repeat unit of Salmonella serogroup E1 O-antigen is reported. This synthesis features a key β-mannosylation reaction through a cesium carbonate-mediated anomeric O-alkylation of a partially protected D-mannose with an L-fucose-derived electrophile for the first time.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Related Products of 14694-95-2. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about Endohedral Plumbaspherenes of the Group 9 Metals: Synthesis, Structure and Properties of the [M@Pb12]3- (M = Co, Rh, Ir) Ions. Author is Li, Ai-Min; Wang, Yi; Downing, Domonique O.; Chen, Fu; Zavalij, Peter; Munoz-Castro, Alvaro; Eichhorn, Bryan W..

The icosahedral [M@Pb12]3- (M = Co (1), Rh (2), Ir (3)) cluster ions were prepared from K4Pb9 and Co(dppe)Cl2 (dppe = 1,2-bis(diphenylphosphino)ethane)/[Rh(PPh3)3Cl]/[Ir(cod)Cl]2 (cod = 1,5-cyclooctadiene), resp., in the presence of 18-crown-6/2,2,2-cryptand in ethylenediamine/toluene solvent mixtures The [K(2,2,2-cryptand)]+ salt of 1 and the [K(18-crown-6)]+ salt of 3 were characterized via x-ray crystallog.; the ions 1 and 3 are isostructural and isoelectronic to the [Rh@Pb12]3- (2) ion as well as to the group 10 clusters [M’@Pb12]2- (M’ = Ni, Pd, Pt). The ions are all 26-electron clusters with near perfect icosahedral Ih point symmetry. Clusters 1-3 show record downfield 207Pb NMR chem. shifts due to σ-aromaticity of the cluster framework. Calculated and observed 207Pb NMR chem. shifts and 207Pb-xM J-couplings (xM = 59Co, 103Rh, 193Ir) are in excellent agreement and DFT anal. shows that the variations of 207Pb NMR chem. shifts for the [M@Pb12]2,3- ions (M = Co, Rh, Ir, Ni, Pd, Pt) are mainly governed by the perpendicularly oriented σ11 component of the chem. shift anisotropy tensor. The laser desorption ionization time-of-flight (LDI-TOF) mass spectra contain the mol. ions as well as several new gas phase clusters derived from the parents. The DFT-minimized structures of these ions are described.

Although many compounds look similar to this compound(14694-95-2)Related Products of 14694-95-2, numerous studies have shown that this compound(SMILES:[Rh]Cl.P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3.P(C4=CC=CC=C4)(C5=CC=CC=C5)C6=CC=CC=C6.P(C7=CC=CC=C7)(C8=CC=CC=C8)C9=CC=CC=C9), has unique advantages. If you want to know more about similar compounds, you can read my other articles.

Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Electric Literature of C54H45ClP3Rh. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about A phosphine-stabilized silylene rhodium complex. Author is Almenara, N.; Miranda, J. I.; Rodriguez-Dieguez, A.; Garralda, M. A.; Huertos, M. A..

The first phosphine-stabilized cationic rhodium silylene complex is reported. A dihydrido-silylene-Rh(III) compound reacts with water and alcs. forming alkoxysilyl-Rh(III) complexes and hydrogen gas. Moreover, benzophenone reacts with a cationic silylene rhodium complex leading to the reduction of the carbonyl group and the formation of an alkoxysilyl-Rh(III) compound which has been identified as a likely intermediate in the mechanism for the hydrosilylation of ketones proposed by Hofmann and Gade.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

The chemical properties of alicyclic heterocycles are similar to those of the corresponding chain compounds. Compound: Tris(triphenylphosphine)chlororhodium, is researched, Molecular C54H45ClP3Rh, CAS is 14694-95-2, about Platinum complexes containing or derived from olefinic phosphines P(X)((CH2)6CH=CH2)2 (X = OH, Ph, (CH2)6CH=CH2); ring closing metathesis, structures, and trans/cis isomerizations, the main research direction is phosphine bicyclic macrocyclic diphosphine platinum complex preparation crystal structure; ring closing metathesis bicyclic macrocyclic diphosphine platinum compound preparation.Recommanded Product: 14694-95-2.

The reaction of (O=)PH((CH2)6CH=CH2)2 (2.0 equiv) and PtCl2 in toluene gives trans-PtCl2(P(OH)((CH2)6CH=CH2)2)2 in 68% yield as a 82:18 mixture of Pt-Cl···H-OP hydrogen bond isomers. Addition of Grubbs’ first generation catalyst followed by hydrogenation (5 bar, cat. RhCl(PPh3)3 or PtO2) affords the doubly trans spanning macrocyclic diphosphine adduct trans- (31-9% crude yields). A crystal structure shows that the two OH groups are anti, and hydrogen bond to opposite Cl-Pt-Cl chlorine atoms. The reaction of P(Ph)((CH2)6CH=CH2)2 (2.0 equiv) and PtCl2 in toluene gives cis-PtCl2(P(Ph)((CH2)6CH=CH2)2)2 (cis-5, 40%) and trans-5 (8%). The crystal structure of the former is determined The trans/cis equilibrium ratios of these and related complexes are probed by DFT. Attempts to crystallize trans- (trans-7′), which is a minor product from a published metathesis/hydrogenation sequence involving trans-PtCl2(P((CH2)6CH=CH2)3)2, give only cis-7′, as established by 31P NMR and crystallog.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate

Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 14694-95-2, is researched, Molecular C54H45ClP3Rh, about An insight into the coordination specificity of polyaromatic hydrocarbons (PAHs) grafted hydrazones towards rhodium(III), the main research direction is rhodium polyaromatic hydrocarbon complex preparation redox potential; frontier mol orbital rhodium polyaromatic hydrocarbon complex; crystal structure rhodium polyaromatic hydrocarbon complex.Application of 14694-95-2.

Upon treatment of the polyaromatic hydrocarbon (PAH) grafted hydrazones HL with [RhCl(PPh3)3], complexes of type [Rh(L)Cl2(PPh3)2] were isolated. The X-ray diffraction technique was used to elucidate the structures of three complexes. The rich spectral features of the complexes in the UV-vis region were explained by TD-DFT and their redox active nature has been validated from the well-defined responses at mild potentials as well as from a theor. investigation of the redox orbitals. Intra-mol. π-π stacking interactions coupled with the electron withdrawing ability of the pendant PAH moiety within the ligand framework play a significant role in altering the mode of coordination (flexidentate behavior of HL) as well as the metal-ligand bond parameters.

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Reference:
Phosphine ligand,
Chiral phosphine ligands in asymmetric synthesis. Molecular structure and absolute configuration of (1,5-cyclooctadiene)-(2S,3S)-2,3-bis(diphenylphosphino)butanerhodium(I) perchlorate tetrahydrofuran solvate