Month: June 2021

Reference of 1038-95-5, An article , which mentions 1038-95-5, molecular formula is C21H21P. The compound – Tri-p-tolylphosphine played an important role in people’s production and life.

Investigating the synthesis and properties of diiron azadithiolate complexes is one of the key topics for mimicking the active site of [FeFe]-hydrogenases, which might be very useful for the design of new efficient catalysts for hydrogen production and the development of a future hydrogen economy. A series of new phosphine-substituted diiron azadithiolate complexes as models for the active site of [FeFe]-hydrogenases are described. A novel and efficient way was firstly established for the preparation of phosphine-substituted diiron azadithiolate complexes. The reaction of Fe2(mu-SH)2(CO)6 and phosphine ligands L affords the intermediate Fe2(mu-SH)2(CO)5L (A). The intermediate reacts in situ with a premixed solution of paraformaldehyde and ammonium carbonate to produce the target phosphine-substituted diiron azadithiolate complexes Fe2[(mu-SCH2)2NH](CO)5L (1a?1f) (L = P(C6H4?4-CH3)3, P(C6H4?3-CH3)3, P(C6H4?4-F)3, P(C6H4?3-F)3, P(2-C4H3O)3, PPh2(OCH2CH3)). Furthermore, reactions of the intermediate A with I-4-C6H4N(CH2Cl)2 in the presence of Et3N give the phosphine-substituted diiron azadithiolate complexes Fe2[(mu-SCH2)2NC6H4?4-I](CO)5L (2a?2e) (L = P(C6H4?4-CH3)3, P(C6H4?3-CH3)3, P(C6H4?4-F)3, P(C6H4?3-F)3, P(2-C4H3O)3). All the complexes were fully characterized using elemental analysis, IR and NMR spectroscopies and, particularly for 1a, 1c?1e, 2a and 2c, single-crystal X-ray diffraction analysis. In addition, complexes 1a?1f and 2a?2e were found to be catalysts for H2 production under electrochemical conditions. Density functional theory calculations were performed for the reactions of Fe2(mu-SH)2(CO)6 + P(C6H4?4-CH3)3.

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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. 1038-95-5, Name is Tri-p-tolylphosphine, molecular formula is C21H21P. In a Article，once mentioned of 1038-95-5, SDS of cas: 1038-95-5

The complex trans-[Rh(NCBPh3)(H)(SnPh3)(PPh3)2] (1) reacts with pyridine and substituted pyridines (L) in dichloromethane at 22 C to give [Rh(NCBPh3)(H)(SnPh3)(PPh3)(L)] (2a) and at -25 C to give trans-[Rh(NCBPh3)(H)(SnPh3)(PPh3)2(L)] (3a). These complexes and numerous analogues can be prepared (the majority in solution only) by the reactions of [Rh(X)(PPh3)3] (X = NCBPh3 (a), N(CN)2 (b), NCS (c), N3 (d), NCO (e), O2CCF3 (f), Cl (g)) with Ph3SnH in solutions containing pyridines (4-Rpy; R = CO2Me, H, NMe2), 1-methylimidazole (1-Meim), and benzonitriles (4-RC6H4CN; R = COMe, H, NMe2) (L). NMR data for the series of complexes 2 in which ligands X, L, and, for X = Cl, the phosphine P(4-C6H4R)3 (R = F, H, Me) were varied independently show systematic changes in the parameters delta(119Sn), delta(103Rh), J(119Sn-1H), and J(103Rh119Sn), which are related to the electron-donating properties of X, L, and the phosphine. Plots of J(119Sn-1H) against delta(119Sn), delta(103Rh), and J(103Rh-119Sn) are approximately linear and show delta(103Rh) and J(103Rh-119Sn) increasing with J(119Sn-1H) and delta(119Sn) decreasing. Complexes 3 give higher values of J(119Sn-1H) and lower values of delta(119Sn) than found for the less electron-rich 2, with data for 3 continuing the trends in J(119Sn-1H) and delta(119Sn) observed for 2. Values of delta(103Rh) and J(103Rh-119Sn) for 3 do not match the pattern found for 2; nor do data for an isomeric form of 3, cis-[Rh(Cl)(H)(SnPh3)(PR3)2(L)] (L = benzonitriles) (4). The plot of J(119Sn-1H)/delta(119Sn) for 3 shows discontinuities at high values of J(119Sn-1H), with the trend in delta(119Sn) toward more negative values (as the ligands become more nucleophilic) being transformed into an increase and changes in J(119Sn-1H) becoming smaller. These patterns of NMR data are interpreted in terms of the weakening of an Rh-(H-Sn) three-center interaction and changes in the coordination geometry of tin as the electron density on rhodium is increased.

Sometimes chemists are able to propose two or more mechanisms that are consistent with the available data.SDS of cas: 1038-95-5, If a proposed mechanism predicts the wrong experimental rate law, however, the mechanism must be incorrect.Welcome to check out more blogs about 1038-95-5, in 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

12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene, molecular formula is C34H28FeP2, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 12150-46-8, name: 1,1-Bis(diphenylphosphino)ferrocene

In this study, the cytotoxic activities of structurally related cycloplatinated(ii) complexes containing chelating and bridging 1,1?-bis(diphenylphosphino)ferrocene (dppf) ligand derived from a wide range of C^N cyclometalating ligands (vpy = deprotonated 2-vinylpyridine, bzq = deprotonated benzo[h]quinoline, bpy = deprotonated 2,2?-bipyridine, bpyO = deprotonated 2,2?-bipyridine N-oxide, and ppy = deprotonated 2-phenylpyridine), were evaluated against human lung (A549), ovarian (SKOV3) and breast (MCF-7) cancer cell lines. The most cytotoxic compounds, 2a, 2c and 2d, effectively produced cell death by inducing apoptosis in the A549, SKOV3 and MCF-7 cancer cell lines. In addition, the molecular docking simulation was performed to determine the specific binding mode and the orientation of binding to DNA. According to the results of biological evaluation, the dppf-containing cycloplatinated(ii) complexes exhibited strong interactions with DNA as well as high cytotoxicity and apoptosis-inducing activities to human cancer cell line. The present study suggests that precise rational design of new platinum-based complexes would result in the preparation of potential anticancer drugs, which can induce facile apoptosis.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.name: 1,1-Bis(diphenylphosphino)ferrocene. In my other articles, you can also check out more blogs about 12150-46-8

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 reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.7650-91-1, Name is Benzyldiphenylphosphine, molecular formula is C19H17P. In a Article，once mentioned of 7650-91-1, Formula: C19H17P

A series of different crosslinked styrene-divinylbenzene-copolymers bearing diphenyl phosphinomethyl groups was reacted with methyl iodide in ethanol.The quaternization has been controlled by elementary analysis of P and I and by ir spectroscopy using a key band at 1123/cm.The spectroscopic method gave satisfactory results with sample amounts of 5 mg polymer in KBr discs.In resins containing up to 7 percent divinylbenzene the methylation was almost quantitative within 1 h refluxing.However, in highly crosslinked polymers (>10percent DVB) containing residues of free chloromethyl groups and intraresin quaternized phosphino groups we observed side reactions in boiling ethanol.These could be avoided by performing the methylation in toluene at room temperature.

The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 7650-91-1 is helpful to your research., Formula: C19H17P

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

12150-46-8, Name is 1,1-Bis(diphenylphosphino)ferrocene, molecular formula is C34H28FeP2, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 12150-46-8, Safety of 1,1-Bis(diphenylphosphino)ferrocene

Two polymorphs of dinuclear mercury-iron complexes, [HgBr2(dppf)] (1) where dppf is 1,1′-bis (diphenylphosphino)ferrocene, are prepared and crystal structures are determined by X-ray crystallography. The reaction of mercury(II) bromide with dppf in methanol-dichloromethane led to orange block polymorph. After crystallization of this complex in DMSO, a red needle polymorph was obtained.

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.Safety of 1,1-Bis(diphenylphosphino)ferrocene. In my other articles, you can also check out more blogs about 12150-46-8

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 1608-26-0. Chemistry is an experimental science, and the best way to enjoy it and learn about it is performing experiments.Introducing a new discovery about 1608-26-0, Name is Tris(dimethylamino)phosphine

Pyrrolo[1,2-a]indole compounds having in free base form the formulas STR1 where R1, R2 and R3 are lower alkyl; R4 is lower alkyl, phenyl, lower alkoxy or STR2 in which R8 and R9 are hydrogen, lower alkyl, phenyl or benzyl; R5 is hydrogen or lower alkyl; A is O or NH; and R6 and R7 are lower alkyl, phenyl, or carbo(lower)alkoxy.

If you are hungry for even more, make sure to check my other article about 1608-26-0. Electric Literature of 1608-26-0

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

1038-95-5, Name is Tri-p-tolylphosphine, molecular formula is C21H21P, belongs to chiral-phosphine-ligands compound, is a common compound. In a patnet, once mentioned the new application about 1038-95-5, HPLC of Formula: C21H21P

The cationic carbyne complexes (1+) (1-) add the anion of monodeprotonated protected mannofuranose (4a), glucofuranose (4b), and fructopyranose (4c) to the carbyne carbon atom to form the carbohydratocarbene complexes 5a-c, 6a, b, and 7a.With 5b, 5c, and 6b the addition proceeds with retention of configuration at the anomeric center.Due to inversion of configuration in the deprotonation step the complexes 5a, 6a, and 7a are obtained as beta-glycosides.The carbene ligand is oxidatively cleaved from the metal by trimethylamine N-oxide or air.Cleavage of the C(carbene)-O bond with reformation of the cation of the carbyne complex 2 is achieved by reaction of 6a with BCl3.Photolysis of in the presence of L affords the carbene complexes .Ethoxide abstraction from 11 and 12 by BF3 gives the chiral cationic carbyne complexes (1+)(1-) (13, 14) which add 4a to form the corresponding mannofuranosylcarbene complexes (15, 16).When 0.5 equivalents of 4a are employed in the reaction with 13, 14 the ratio of diastereomers is 3:2, both for 15 and 16.Complex 11 was characterized by an X-ray structural analysis. – Key Words: Carbene complexes/ Carbyne complexes/ Carbohydrates/ Diastereoselective addition

Balanced chemical reaction does not necessarily reveal either the individual elementary reactions by which a reaction occurs or its rate law.HPLC of Formula: C21H21P. In my other articles, you can also check out more blogs about 1038-95-5

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 reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.224311-51-7, Name is 2-(Di-tert-Butylphosphino)biphenyl, molecular formula is C20H27P. In a Article，once mentioned of 224311-51-7, Quality Control of: 2-(Di-tert-Butylphosphino)biphenyl

Structural features of 26 mononuclear octahedral monooxo d2-Re(V) complexes with singly charged oxygen atoms of bidentate-chelating (O,N) ligands (Ln), namely, [ReO(Ln)(Lmono)3] (where Lmono stands for a monodentate ligand) containing six- and seven-membered chelate rings ReNC3O and ReNC4O, are considered. The atoms O(Ln), with one exception, are in the trans positions to ligands O(oxo). In [ReO(OPPh3)Cl2(L35)], the trans position to the oxo ligand is occupied by the neutral oxygen atom of ligand OPPh3. In [ReO(Hal)2(Ln)(Lmono)] [(Lmono = PPh3, AsPPh3, and OPPh3)] structures, two geometric isomers exist: halide ligands are either in the cis- or in the trans position to each other.

The reactant in an enzyme-catalyzed reaction is called a substrate. Enzyme inhibitors cause a decrease in the reaction rate of an enzyme-catalyzed reaction.I hope my blog about 224311-51-7 is helpful to your research., Quality Control of: 2-(Di-tert-Butylphosphino)biphenyl

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

Reference of 1034-39-5, Catalysts are substances that increase the reaction rate of a chemical reaction without being consumed in the process. 1034-39-5, Name is Dibromotriphenylphosphorane, molecular formula is C18H15Br2P. In a Article，once mentioned of 1034-39-5

Reactions of N-monosubstituted benzamides with Ph3PBr2 and Et3N in refluxing CH2Cl2 for 0.5 – 5 hours give good yields of N,N’-disubstituted-N-acylamidines.The latter compounds may be regarded as intermolecular N-imidoylation products of the amide group.Under the same reaction conditions, N-monosubstituted amides containing C-H bonds adjacent to the carbonyl function and N-monosubstituted formamides are dehydrated to ketenimines and isonitriles, respectively.Treatment of N-methyl-benzamide with Ph3PBr2 and Et3N leads to the formation of an intermediate whose ir spectrum is consistent with the N,N,N-triethyl-N’-methylbenzamidinium salt structure.A substance with identical spectroscopic characteristics was obtained on treatment of N-methyl-alpha-bromobenzylideneammonium bromide with Et3N.Products of the reaction of 5- and 6-membered lactams with Ph3PBr2 and Et3N are inactive as imidoylating agents; consequently, these lactams do not undergo self-condensation to N-imidoylation products, but they can participate in the imidoylation reactions as nucleophiles subjected to imidoylation.In contrast to the 5- and 6-membered lactams, epsilon-caprolactam undergoes self-condensation to the expected N-imidoylation product.Possible mechanistic pathways for the imidoylation reaction of the amide group have been suggested.

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 1034-39-5 is helpful to your research., Reference of 1034-39-5

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 reaction rate of a catalyzed reaction is faster than the reaction rate of the uncatalyzed reaction at the same temperature.1038-95-5, Name is Tri-p-tolylphosphine, molecular formula is C21H21P. In a Review，once mentioned of 1038-95-5, category: chiral-phosphine-ligands

Ruthenium complexes with the formulae Ru(CO)2(PR3)2(O2CPh)2 [6a-h; R=n-Bu, p-MeO-C6H4, p-Me-C6H4, Ph, p-Cl-C6H4, m-Cl-C6H4, p-CF3-C6H4, m,m?-(CF3)2C6H3] were prepared by treatment of triruthenium dodecacarbonyl [Ru3(CO)12] with the respective phosphine and benzoic acid or by the conversion of Ru(CO)3(PR3)2 (8e-h) with benzoic acid. During the preparation of 8, ruthenium hydride complexes of type Ru(CO)(PR3)3(H)2 (9g, h) could be isolated as side products. The molecular structures of the newly synthesized complexes in the solid state are discussed. Compounds 6a-h were found to be highly effective catalysts in the addition of carboxylic acids to propargylic alcohols to give valuable beta-oxo esters. The catalyst screening revealed a considerably influence of the phosphine?s electronic nature on the resulting activities. The best performances were obtained with complexes 6g and 6h, featuring electron-withdrawing phosphine ligands. Additionally, catalyst 6g is very active in the conversion of sterically demanding substrates, leading to a broad substrate scope. The catalytic preparation of simple as well as challenging substrates succeeds with catalyst 6g in yields that often exceed those of established literature systems. Furthermore, the reactions can be carried out with catalyst loadings down to 0.1mol% and reaction temperatures down to 50 C.

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.category: chiral-phosphine-ligands, you can also check out more blogs about1038-95-5

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