Category: 13406-29-6

Application of 13406-29-6, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine, molecular formula is C21H12F9P. In a Article£¬once mentioned of 13406-29-6

The donor strengths of the following triarylphosphine ligands P(Ar) 2(Ar?) (Ar = Ar? = 4-Me3SiC6H 4, 1b; 4-Me3CC6H4, 1d; 4-F 3CC6H4, 1e; Ar = C6H5, Ar? = 4-Me3SiC6H4, 1c) have been evaluated experimentally and theoretically. The measurements of the J(P-Se) coupling constants of the corresponding synthesised selenides Se=P(Ar) 2(Ar?), 2b,c and the DFT calculation of the energies of the phosphine lone-pair (HOMO) reveal insignificant influence on the electronic properties of the substituted phosphines when the trimethylsilyl group is attached to the aryl ring, in marked contrast to the strong electronic effect of the trifluoromethyl group. These triarylphosphine ligands P(Ar) 2(Ar?) reacted with (eta5-C5H 5)Co(CO)2, (eta5-C5H 5)Co(CO)I2 or PdCl2 to yield the new compounds (eta5-C5H5)Co(CO)[P(Ar) 2(Ar?)], 3b,d; (eta5-C5H 5)CoI2[P(Ar)2(Ar?)], 4b-e; and PdCl 2[P(Ar)2(Ar?)]2, 5b,c, respectively. These complexes have been characterized and their spectroscopic properties compared with those reported for the known triphenylphosphine complexes. Again, the contrast of the 31P NMR and 13C NMR chemical shifts or C-O or M-Cl stretching frequencies, when applied, does not show an important electronic effect on the metal complex of the trimethylsilyl substituted phosphines with respect to P(C6H5)3 derivatives. Solubility measurements of complexes 3a and 3b in scCO2 were performed. We conclude that Me3Si groups on the triarylphosphine improve the solubility of the corresponding metal complex in scCO2.

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 13406-29-6 is helpful to your research., Application of 13406-29-6

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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 13406-29-6. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine. In a document type is Article, introducing its new discovery.

New chiral cyclopentadienylrhenium lewis acids featuring fluorinated triarylphosphanes and enhanced acceptor abilities – An unusual carbon-fluorine bond activation in a metal coordination sphere

The acetonitrile complex [(eta5-C5H5)Re(NO)(NCCH3)(CO)] +BF4- (1) and P(4-C6H4CF3)3 slowly react (2 d, room temperature) to give the substitution product [(eta5-C5H5)Re(NO){P(4-C6H 4CF3)3}(CO)]+BF4 – (3, 85%). The reaction of 1 and less nucleophilic P(C6F5)3 must be conducted in a melt at 140C, but [(eta5-C5H5)Re(NO){P(C6F 5)3}(CO)]+BF4- (11) is isolated in 90% yield. Reduction of 3 by NaBH4 gives the methyl complex (eta5-C5H5)Re(NO){P(4-C6H 4CF3)3}(CH3), which is treated with TfOH and H3CN=C(H)C6H5 to give the imine complex [(eta5-C5H5)Re(NO)(PPh3){N(CH 3)=C(H)C6H5}]+TfO- (9). Complex 9 was, like the non-fluorinated analog, unreactive towards allyltin nucleophiles. Complex 11 should lead to a more reactive imine complex, but NaBH4 gave a methyl complex that was difficult to purify. However, NaOCH3 or NaSCH3/methanol gave easily purified (eta5-C5H5)Re(NO){P(4-C6F 4OCH3)3}(CO2CH3) (85%) or (eta5-C5H5)Re(NO){P(4-C6F 4SCH3)3}(CO2CH3) (51%), in which all para-fluorine atoms have undergone nucleophilic displacements, and the carbonyl ligands methoxide additions. This suggests that catalytic chemistry of the chiral Lewis acid [(eta5-C5H5)Re(NO){P(C6F 5)3}]+(I-F15) will be complicated by nucleophilic degradation. Nonetheless, density functional calculations show that I-F15 is a much stronger sigma acceptor and weaker pi donor than less fluorinated analogs.

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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

Application of 13406-29-6, 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. 13406-29-6, C21H12F9P. A document type is Article, introducing its new discovery.

Reactions of 2,4-hexadiyne-1,6-diol with [H2Os 3(CO)9(PR3)] clusters. Cyclization of the diyne and reversible exchange of the phosphine ligands between different positions of the “Os3C3” framework

Reactions between unsaturated [H2Os3(CO) 9(PR3)] clusters (PR3 = PPh3, P(4-CF3-C6H4)3, PEt3) and 2,4-hexadiyne-1,6-diol have been studied. It was found that the diyne ligand easily reacts with all these complexes to give [HOs3(CO) 8(PR3){mu3,eta1 : eta3 : eta1-(CH3-C-C=CH-CH=C-O)}] complexes (V, VI and VII, respectively) containing the “Os3C 3” pentagonal pyramid cluster framework. This structural pattern is formed through the diyne cyclization, dissociation of a CO ligand and eventual coordination of the cyclized organic moiety to the osmium triangle in the mu3,eta1 : eta3 : eta1 manner. In the case of the PEt3 substituted cluster the second hydride transfer onto the organic fragment occurs to afford the nonhydride [Os3(CO)8 (PR3) {mu3, eta1 : eta2 : eta1-(CH 3-CH-C=CH-CH=C-O)}] cluster, VIII, containing distorted pentagonal pyramid framework with a broken Os-C bond. Heating of V, VI and VII in hexane solutions results in formation of the regioisomers (Va, VIa and VIIa) with the phosphine ligand located at adjacent osmium atoms across the Os-Os bond bridged by the coordinated organic fragment. The most probable mechanism of the isomerization includes reversible phosphine migration between these metal centres. Solid-state structure of V, Va, VI, VIIa and VIII have been established by single crystal Xray diffraction. A general mechanistic scheme for the diyne ligand cyclization and cluster framework transformations is suggested and discussed.

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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

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. 13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine, molecular formula is C21H12F9P. In a Review，once mentioned of 13406-29-6, HPLC of Formula: C21H12F9P

Platinum coordination compounds with potent anticancer activity

Many international researchers have strived to understand the mechanism of action or improve the efficacy of inorganic coordination compounds that have been identified to exhibit anticancer activity. The inherent challenges of chemotherapy demand that new strategies be developed utilising different mechanisms of action to interrupt the cellular machinery of cancer cells. In Australia, we have benefited from the research of colleagues who have influenced modern platinum chemistry by contributing to our understanding of platinum oxidation and reduction, the mechanism of action of cisplatin, and unique design strategies for new platinum complexes. The purpose of this review is to provide some background in the history and development of platinum(II) and platinum(IV) complexes.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.HPLC of Formula: C21H12F9P. In my other articles, you can also check out more blogs about 13406-29-6

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

13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine, molecular formula is C21H12F9P, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 13406-29-6, COA of Formula: C21H12F9P

The ligand 1,1?-bis(diphenylphosphino)ferrocene (dppf) is commonly employed in a variety of catalytic systems. There are a variety of coordination modes known for dppf, the least studied being the kappa3 coordination mode, in which both phosphorus atoms and the iron atom of dppf interact with another metal center. One such compound is the previously reported [Pd(kappa3-dppf)(PPh3)]2+. A series of related compounds, [Pd(kappa3-dppf)(P(p-C6H4R)3)]2+ (R = OCH3, CH3, F and CF3), has been synthesized and characterized. The X-ray crystal structure of [Pd(dppf)(P(p-C6H4F)3)][BF4]2 was determined. Electrochemical and computational studies indicate that the electron donor ability of the P(p-C6H4R)3 ligands influences the properties of these compounds. Substitution reactions of the P(p-C6H4R)3 ligands have been examined, and, in general, the more electron donating P(p-C6H4R)3 ligands completely replace the less electron donating ones. The kinetics of the reaction of [Pd(kappa3-dppf)(P(p-C6H4F)3)]2+ with P(p-C6H4OCH3)3 indicate that the reaction proceeds through a dissociative mechanism, contrary to the associative substitutions prevalent in square planar palladium(ii) chemistry.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.COA of Formula: C21H12F9P. In my other articles, you can also check out more blogs about 13406-29-6

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 of 13406-29-6, 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. 13406-29-6, C21H12F9P. A document type is Article, introducing its new discovery.

Reaction of Triarylphosphines with Tetramethyl-1,2-dioxetane: Kinetics of Formation and Decomposition of 2,2-Dihydro-4,4,5,5-tetramethyl-2,2,2-triaryl-1,3,2-dioxaphospholanes

The reaction of a series of triarylphosphines <(XC6H4)3P> with tetramethyl-1,2-dioxetane (1) in C6D6 produced a series of 2,2-dihydro-4,4,5,5-tetramethyl-2,2,2-triaryl-1,3,2-dioxaphospholanes in high yield.Thermal decomposition of the phosphoranes produced tetramethylethylene oxide and the corresponding triarylphosphine oxides in all cases.The kinetics of phosphorane formation and decomposition in benzene was investigated.The rate data for phosphorane formation showed a reasonable correlation with ?+ constants (correlation coefficient ca 0.98: rho = -0.82).Theresults are not consistent with nucleophilic attack on oxygen by phosphorus but rather with a concerted (biphilic) insertion into the peroxy bond of the dioxetane.Phosphorane decomposition (at 38 deg C) was found to be substantially more sensitive to substituent effects than phosphorane formation.A good correlation of phosphorane decomposition with Hammett ? constants was obtained (correlation coefficient = 0.997, rho = -3.51 +/- 0.24).This result is consistent with a mechanism that involves heterolytic cleavage of a phosphorus-oxygen bond followed by the irreversible internal displacement of triarylphosphine oxide.

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Reference£º
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

Reference of 13406-29-6, 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. 13406-29-6, C21H12F9P. A document type is Article, introducing its new discovery.

Reaction of Triarylphosphines with Tetramethyl-1,2-dioxetane: Kinetics of Formation and Decomposition of 2,2-Dihydro-4,4,5,5-tetramethyl-2,2,2-triaryl-1,3,2-dioxaphospholanes

The reaction of a series of triarylphosphines <(XC6H4)3P> with tetramethyl-1,2-dioxetane (1) in C6D6 produced a series of 2,2-dihydro-4,4,5,5-tetramethyl-2,2,2-triaryl-1,3,2-dioxaphospholanes in high yield.Thermal decomposition of the phosphoranes produced tetramethylethylene oxide and the corresponding triarylphosphine oxides in all cases.The kinetics of phosphorane formation and decomposition in benzene was investigated.The rate data for phosphorane formation showed a reasonable correlation with ?+ constants (correlation coefficient ca 0.98: rho = -0.82).Theresults are not consistent with nucleophilic attack on oxygen by phosphorus but rather with a concerted (biphilic) insertion into the peroxy bond of the dioxetane.Phosphorane decomposition (at 38 deg C) was found to be substantially more sensitive to substituent effects than phosphorane formation.A good correlation of phosphorane decomposition with Hammett ? constants was obtained (correlation coefficient = 0.997, rho = -3.51 +/- 0.24).This result is consistent with a mechanism that involves heterolytic cleavage of a phosphorus-oxygen bond followed by the irreversible internal displacement of triarylphosphine oxide.

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Reference£º
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 13406-29-6. Let¡¯s face it, organic chemistry can seem difficult to learn. Especially from a beginner¡¯s point of view. Like 13406-29-6, Name is Tris(4-(trifluoromethyl)phenyl)phosphine. In a document type is Article, introducing its new discovery.

A novel cationic dinuclear ruthenium complex: Synthesis, characterization and catalytic activity in the transfer hydrogenation of ketones

A novel cationic dinuclear ruthenium complex [RuCl(HL)(TFTPP)]2 (H2L = 2,6-bis(5-phenyl-1H-pyrazol-3-yl)pyridine; TFTPP = tri(p-trifluoromethylphenyl)phosphine) has been synthesized and characterized by 31P{1H} NMR, 1H NMR, elemental analysis and X-ray crystallography. This complex is the first cationic dinuclear ruthenium complex bearing N4 ligand characterized by single crystal X-ray analysis. It exhibits good catalytic activity for the transfer hydrogenation of ketones in refluxing 2-propanol.

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Reference£º
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

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. 13406-29-6, C21H12F9P. A document type is Article, introducing its new discovery., Recommanded Product: Tris(4-(trifluoromethyl)phenyl)phosphine

Ligand exchange and substitution at platinum(II) complexes: Evidence for a dissociative mechanism

Square-planar complexes of the type cis-[Pt(Me)2(Me 2SO)(PR3)] (1-6) where PR3 represents a series of isosteric tertiary phosphanes [P(4-MeOC6H4) 3, P(4-MeC6H4)3, P(C 6H5)3, P(4-FC6H4) 3, P(4-ClC6H4)3, P(4-CF 3C6H4)3] have been synthesised and fully characterised through elemental analysis, 1H and 31P{1H} NMR. The coupling constants 1J PtP with the isotopically abundant 195Pt (33%, I=1/2) of 1-6, as those of the pyridine cis-[Pt(Me)2(py)(PR3)] derivatives (7-12), show linear dependencies on the basicity of the coordinated phosphane. The rates of dimethyl sulfoxide exchange for all the complexes have been measured at relatively low temperatures by 1H NMR isotopic labelling experiments with deuterated chloroform as the solvent. Pyridine for dimethyl sulfoxide substitution has been studied at higher temperatures through conventional spectrophotometric techniques. The rates of both processes show no dependence on ligand concentration, for each complex the value of the rate of ligand substitution is in reasonable agreement with the value of the rate of ligand exchange at the same temperature, and the kinetics are characterised by largely positive entropies of activation. There is a compensation-effect between DeltaH? and DeltaS?, i.e., a greater DeltaH? is accompanied by a larger positive DeltaS?, indicating that all complexes react via the same mechanism. The basicity of the phosphane does not affect significantly the reaction rates. The general pattern of behaviour indicates that the rate determining step for substitution is the dissociation of the sulfoxide ligand and the formation of a three-coordinated [Pt(Me)2(PR3)] uncharged intermediate.

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Reference£º
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

Reference of 13406-29-6, An article , which mentions 13406-29-6, molecular formula is C21H12F9P. The compound – Tris(4-(trifluoromethyl)phenyl)phosphine played an important role in people’s production and life.

Effects of Cyclopentadienyl and Phosphine Ligands on the Basicities and Nucleophilicities of Cp’Ir(CO)(PR3) Complexes

Basicities of the series of complexes CpIr(CO)(PR3) [PR3 = P(p-C6H4CF3)3 P(p-C6H4F)3, P(p-C6H4Cl)3, PPh3, P(p-C6H4CH3)3, P(p-C6H4OCH3)3, PPh2Me, PPhMe2, PMe3, PEt3, PCy3] have been measured by the heat evolved (DeltaHHM) when the complex is protonated by CF3SO3H in 1,2-dichloroethane (DCE) at 25.0 C. The -DeltaHHM values range from 28.0 kcal/mol for CpIr(CO)[P(p-C6H4CF3)3] to 33.2 kcal/mol for CpIr(CO)(PMe3) and are directly related to the basicities of the PR3 ligands in the complexes. For the more basic pentamethylcyclopentadienyl analogs, the -DeltaHHM values range from 33.8 kcal/mol for the weakest base Cp*Ir(CO)[P(p-C6H4CF3)3] to 38.0 kcal/mol for the strongest Cp*Ir(CO)(PMe3). The nucleophilicities of the Cp’Ir(CO)(PR3) complexes were established from second-order rate constants (k) for their reactions with CH3I to give [Cp’Ir(CO)(PR3)(CH3)]+I- in CD2Cl2 at 25.0 C. There is an excellent linear correlation between the basicities (DeltaHHM) and nucleophilicities (log k) of the CpIr(CO)(PR3) complexes. Only the complex CpIr(CO)(PCy3) with the bulky tricyclohexylphosphine ligand deviates dramatically from the trend. In general, the pentamethylcyclopentadienyl complexes react 40 times faster than the cyclopentadienyl analogs. However, they do not react as fast as predicted from electronic properties of the complexes, which suggests that the steric size of the Cp* ligand reduces the nucleophilicities of the Cp*Ir(CO)(PR3) complexes. In addition, heats of protonation (DeltaHHP) of tris(2-methoxyphenyl)phosphine, tris(2,6-dimethoxyphenyl)phosphine, and tris(2,4,6-trimethylphenyl)phosphine were measured and used to estimate pKa values for these highly basic phosphines.

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Reference£º
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